Engine fault warning light (check engine): which faults cause it?

The most important among the documented faults: oil-bath timing belt degradation, in the 1.2 PureTech; wear and breakage of the 7 mm chain between the camshafts, in the 1.5 BlueHDi; timing chain stretch and tensioner failure (EA111), in the 1.2 and 1.4 TSI; rear timing chain stretch and breakage, in the BMW N47; timing chain stretch and tensioner failure, in the OM651; intake swirl flap breakage (swirl flaps), in the BMW M47; timing chain stretch, in the 2.0 Ingenium diésel and the 1.6 CRDi; piston breakage and oil consumption in the 1.4 TSI twincharger, in the 1.2 and 1.4 TSI.

Warning lights and alertsUrgency: Garage soon

Engine fault warning light (check engine): causes and the faults that trigger it

The engine warning light, the yellow or orange outline of an engine, comes on when the control unit detects a mechanical or electronic fault in the engine or the emissions system, but it does not say which one by itself. If it stays steady and the car drives normally, you can carry on with caution to a garage to have the codes read; if it flashes, turns red or the car loses power, the sensible thing is to stop. With it on, the car will also fail the ITV (the Spanish roadworthiness inspection, equivalent to the MOT).^{[1][2][3][4][5]}

Colour: yellow or amber. Symbol: outline of an engine seen from the side, in yellow or orange.

204 documented faults cause it in 117 engines. The most important:

Critical severity: Oil-bath timing belt degradation · 1.2 PureTech
Critical severity: Wear and breakage of the 7 mm chain between the camshafts · 1.5 BlueHDi
Critical severity: Timing chain stretch and tensioner failure (EA111) · 1.2 and 1.4 TSI

What it means

The orange engine-shaped warning light comes on when the ECU detects a fault affecting combustion or emissions. If it flashes, it usually points to misfires that can damage the catalytic converter.

General explanation from MotorFiable. How it shows up in each engine, with sources, is in the list of faults.

What to do now

Garage soon

If it stays on steadily, you can drive gently to a garage and ask for a fault code read-out. If it flashes or you notice a loss of power, slow down and get to a garage as soon as possible.

Reviewed on 30 October 2026198 sources How we work

Most common causes

From most to least likely according to the sources. Under each cause, the part and the related OBD codes.

1. Faulty lambda sensor (oxygen sensor)
Common cause
The lambda sensor monitors the car's emissions. If it gives wrong data, the control unit corrects the air-fuel mixture badly: the engine performs worse, uses more fuel and the fault warning light comes on.^[1][6]
Faults with with the engine sensors
2. Dirty or blocked EGR valve
Common cause
With accumulated carbon, the EGR valve can become blocked and trigger the engine fault light. RACE includes it among the faults that trigger the exhaust emissions warning light.^[1][2]
Faults with with the EGR valve
3. Deteriorated or blocked catalytic converter
Common cause
When the catalytic converter becomes blocked or deteriorates, the engine loses efficiency and power, uses more fuel and the engine fault warning light appears. Autodoc Club links code P0420 to catalytic converter efficiency below the required level.^[1][7][8]
P0420
4. Spark plugs, coils or ignition leads in poor condition
Common cause
A worn spark plug can cause combustion misfires. Autodoc Club cites spark plugs, their leads and the ignition coils as the first causes of code P0300 (misfires), which can also cause lack of power and hesitation when accelerating.^[1][9]
Faults with with the ignition coils P0300
5. Faulty injectors
Possible cause
If an injector fails, the car can lose power, jerk or use more fuel, and the fault warning light comes on.^[1]
Faults with with the injectors
6. Blocked particulate filter
Possible cause
RACE lists a blocked particulate filter among the causes of the exhaust emissions warning light, along with the EGR, the lambda sensor, the catalytic converter, the injection system and exhaust leaks.^[2]
Faults with with the particulate filter
7. Fuel filler cap not closed properly
Possible cause
A badly closed cap can alter the pressure in the fuel system and turn the warning light on. It is the simplest cause to check and should be ruled out before going to the garage.^[1]
8. Electrical fault, or a fault in a sensor or the control unit
Uncommon
Electrical errors, faulty sensors and control unit (ECU) failures also trigger the warning light. Autodoc Club adds battery problems and electrical faults among the causes.^[1][3]
Faults with with the control units Faults with with the engine sensors

Depending on what you notice

The engine warning light is steady or flashing

Steady, it normally indicates a moderate fault or something to be checked soon. If it flashes, the situation may be more serious: RACE describes it as a serious problem that can damage the engine or the catalytic converter, and Autodoc Club recommends stopping in a safe place.^[1][2][3]

Engine warning light yellow, orange or red

It is the same engine symbol: RACE describes it as yellow or orange when it signals a moderate fault and red when it flashes because of a serious problem. If you see it red and flashing, or the car loses power, the advisable course is to stop the vehicle.^[1][2]

Engine warning light without loss of power

If the light stays steady and the car shows no strange symptoms, RACE and Autodoc Club agree that you can drive with caution to a garage. Do not let it go: ignoring it can end in a more serious fault.^[1][2][3]

Engine fault light with loss of power

If, besides the light, the car loses power, makes noises or gives off smoke, Autodoc Club and RACE advise stopping. Injectors in poor condition, a blocked catalytic converter or a damaged lambda sensor can cause that loss of performance.^[1][3][6][7]

The fault light comes on while I am driving

It coming on while the car is running indicates a possible fault in the engine or the emissions system. Note whether the light stays steady or flashes and whether the car's behaviour changes: if it drives normally, go to a garage soon; if not, stop in a safe place.^[1][3]

How to turn off the engine warning light

The route the sources describe is to repair the fault and then reset the light with an OBD diagnostic machine; clearing it without repairing only makes it come back on. Do not clear it just before the ITV: if the clearing was less than an hour ago or less than a kilometre ago, it counts as a serious defect.^[1][4]

What to check first

Note how the light behaves (steady or flashing; yellow, orange or red) and whether the car loses power, jerks, makes noises or gives off smoke. That decides whether you can carry on or must stop.^[1][3]
Check that the fuel filler cap is properly closed: a badly closed cap is one of the causes RACE cites and the easiest to rule out.^[1]
Have the codes read through the OBD port at a garage with a diagnostic machine: the error codes point to the part that is failing (sensor, EGR, injectors, ignition, catalytic converter).^[1][8][9]
Repair the cause and only then reset the light with the diagnostic machine. If you clear it without repairing, it will come back on.^[1]
If your ITV is coming up, do not go with the warning light on or clear the codes just beforehand: it counts as a serious defect and the inspection will be failed.^[4][5]

Can I keep driving?

Urgency: Garage soon

It depends on how the car behaves. With the light steady and the car running normally, the sources consulted allow you to reach a garage with caution, without delaying the visit. If it flashes, appears in red or there is loss of power, noises or smoke, the advisable course is to stop in a safe place. Leaving the warning unattended can end in a major fault.^[1][2][3]

How much it costs to fix

Indicative prices published by the sources cited; they depend on the car and the garage.

Repair	Price
Replacing the lambda sensor (part only; labour is extra and depends on where it is mounted)^[6]	€60 – €250
Replacing the EGR valve (part and labour, according to RACE)^[10]	€130 – €800
Replacing the catalytic converter (indicative RACE range, which varies with size and model and does not say whether labour is included)^[7]	€500 – €1,500

Documented faults that cause it

Specific engine and gearbox faults, from most to least important (severity × frequency). Below each title, how the symptom shows up in that fault.

- Critical severityFrequency: Very frequent1.2 PureTechOil-bath timing belt degradationEngine warning light with fault codes stored in the ECU.Repair (garage): €400–€800
Source for the symptom in the 1.2 PureTech^[11]
- Critical severityFrequency: Very frequent1.5 BlueHDiWear and breakage of the 7 mm chain between the camshaftsEngine warning light on.Repair (garage): €730–€820
Source for the symptom in the 1.5 BlueHDi^[12]
- Critical severityFrequency: Very frequent1.2 and 1.4 TSITiming chain stretch and tensioner failure (EA111)Fault warning light on because of a lack of synchronisation between the crankshaft and camshaft (for example, code P3008).Repair (garage): €700–€1,400Appears at around 30,000 km
Source for the symptom in the 1.2 and 1.4 TSI^[13]
- Critical severityFrequency: Very frequentBMW N47Rear timing chain stretch and breakageEngine warning light on when the ECU detects a timing mismatch between the crankshaft and the camshafts.Repair (garage): €1,590–€3,000Appears at around 50,000 km
Source for the symptom in the BMW N47^[14]
- Critical severityFrequency: Very frequentOM651Timing chain stretch and tensioner failureA fault code for a mismatch between the crankshaft and camshafts once the chain has stretched appreciably.Repair (garage): €2,000–€3,500Appears at around 120,000 km
Source for the symptom in the OM651^[15]
- Critical severityFrequency: Very frequentBMW M47Intake swirl flap breakage (swirl flaps)Engine warning light on when the ECU detects an anomaly in the intake airflow.
Source for the symptom in the BMW M47^[16]
- Critical severityFrequency: Very frequent2.0 Ingenium diéselTiming chain stretchA fault code for a mismatch between the crankshaft and the camshafts once the chain has slipped appreciably.Repair (garage): €4,000–€7,000Appears at around 90,000 km
Source for the symptom in the 2.0 Ingenium diésel^[17][18]
- Critical severityFrequency: Common1.2 and 1.4 TSIPiston breakage and oil consumption in the 1.4 TSI twinchargerFault warning light with stored misfire codes.
Source for the symptom in the 1.2 and 1.4 TSI^[19]
- Critical severityFrequency: Common1.2 TCeExcessive oil consumption and engine failureEngine fault warning light on, although in some cases it never comes on.Repair: €5,000–€10,000
Source for the symptom in the 1.2 TCe^[20][21]
- Critical severityFrequency: CommonBMW N47Broken intake manifold swirl flapsEngine warning light on, sometimes with a code related to misfires or the intake airflow.
Source for the symptom in the BMW N47^[22]
- Critical severityFrequency: Common1.6 CRDiMHSG belt tensioner and crankshaft pulley failure (48V mild hybrid)Intelligent Stop&Go system warning light or engine fault light on.
Source for the symptom in the 1.6 CRDi^[23]
- Critical severityFrequency: Common1.6 CRDiTiming chain stretchThe engine fault light may come on if the computer detects a camshaft position offset.Appears at around 120,000 km
Source for the symptom in the 1.6 CRDi^[24]
- Critical severityFrequency: CommonBMW N13Timing chain and tensioner wearEngine warning light on when the ECU detects a loss of synchronisation between the crankshaft and camshafts.
Source for the symptom in the BMW N13^[25]
- Critical severityFrequency: CommonBMW N20Timing chain guide and tensioner wear (2011-2015)Engine fault warning light on when the control unit detects a loss of synchronisation between the crankshaft and the camshafts.Appears at around 129,000 km
Source for the symptom in the BMW N20^[26]
- Critical severityFrequency: Common2.3 MZR DISI TurboTiming chain stretch and VVT actuator failure on the 2.3 DISI TurboVVT or timing faults can turn on the engine warning light, according to the complaints collected on CarComplaints.Appears at around 100,000 km
Source for the symptom in the 2.3 MZR DISI Turbo^[27]
- Critical severityFrequency: CommonM271Timing chain stretch and wear of the camshaft sprocketsThe control unit may log a mismatch between the crankshaft and camshafts as wear progresses.
Source for the symptom in the M271^[28]
- Critical severityFrequency: CommonM272/M273Wear of the balance shaft gear and the timing sprocketsEngine warning light with crankshaft-camshaft correlation codes (P0016, P0017, P0008, P0009), often with no audible noise.
Source for the symptom in the M272/M273^[29]
- Critical severityFrequency: CommonOM642Broken swirl flaps in the intake manifoldEngine warning light with codes related to the intake flap circuit.Repair (garage): €600–€1,200Appears at around 100,000 km
Source for the symptom in the OM642^[30]
- Critical severityFrequency: CommonOM654Timing chain wear or breakage (2016 to 2021 units)Engine fault warning light if the control unit detects a mismatch between the crankshaft and the camshafts.
Source for the symptom in the OM654^[31]
- Critical severityFrequency: Common2.5 dCi YD25Timing chain wear and failureEngine warning light, rough idle or incorrect timing when the chain is badly stretched.Appears at around 100,000 km
Source for the symptom in the 2.5 dCi YD25^[32]
- Critical severityFrequency: Common1.0/1.2/1.4 EcotecTiming chain stretch and breakageThe engine warning light may come on if the ECU detects that the timing has gone out of sync.Repair (garage): €900–€1,400Appears at around 70,000 km
Source for the symptom in the 1.0/1.2/1.4 Ecotec^[33]
- Critical severityFrequency: Common1.6 THPTiming chain and tensioner stretch (turbo versions, before 2012)Engine warning light on when the control unit detects a loss of synchronisation between the crankshaft and the camshafts.
Source for the symptom in the 1.6 THP^[34]
- Critical severityFrequency: CommonD4/D5Auxiliary belt breakage that takes the timing belt with it (5-cylinder)The engine warning light comes on if the valves hit the pistons after the timing failure.
Source for the symptom in the D4/D5^[35]
- Critical severityFrequency: Common1.2 12VTiming chain stretch and tensioner wearThe engine warning light can come on if the timing offset affects combustion.Appears at around 87,000 km
Source for the symptom in the 1.2 12V^[36]
- High severityFrequency: Very frequent1.0 PureTechExcessive oil consumption through the piston ringsEngine fault warning light due to catalytic converter faults, which some owners link to burnt oil.
Source for the symptom in the 1.0 PureTech^[37]
- High severityFrequency: Very frequent1.6 HDiTurbo failure through lack of lubrication (carbon deposits and union filter)Engine fault warning light on together with the loss of power.Repair (garage): €700–€1,050
Source for the symptom in the 1.6 HDi^[38]
- High severityFrequency: Very frequentOM651Delphi piezo injector failure (220/250 CDI)Engine warning light or limp mode when the ECU detects an injector fault.Repair (garage): €3,600–€5,900
Source for the symptom in the OM651^[39]
- High severityFrequency: Common2.0 HDiVariable-geometry turbo failures (actuator, sensors and clogging)Engine fault warning light on.
Source for the symptom in the 2.0 HDi^[40]
- High severityFrequency: CommonBMW N52 / N53N53 piezoelectric injector failureEngine warning light on.
Source for the symptom in the BMW N52 / N53^[41]
- High severityFrequency: CommonBMW N57Loss of thrust on twin-turbo versions due to the vacuum circuit or the actuatorEngine warning light associated with variable-geometry turbo faults, cited generically for the N57 without further detail.
Source for the symptom in the BMW N57^[42]
- High severityFrequency: Common1.4 T-JetPremature turbocharger failure or wearThe engine warning light comes on when the ECU detects a boost pressure outside the expected range.Repair: €1,100–€2,300Appears at around 15,000 km
Source for the symptom in the 1.4 T-Jet^[43][44]
- High severityFrequency: Common1.9 JTD/Multijet and 2.4 JTDIntake manifold flap failure (swirl effect)Engine warning light on when the ECU detects that the flaps are not responding to the command given.
Source for the symptom in the 1.9 JTD/Multijet and 2.4 JTD^[45]
- High severityFrequency: Common2.2/2.5 dCiInjection pump or injector failureThe engine warning light can come on when the ECU detects an injection fault.
Source for the symptom in the 2.2/2.5 dCi^[46]
- High severityFrequency: CommonPorsche V8 and V6 (Cayenne and Panamera)Timing chain stretch on the Cayenne VR6 V6 enginesCamshaft position codes relative to the crankshaft (P0016 to P0019), which a German workshop cites when diagnosing the chain on the 957/958 Cayennes.
Source for the symptom in the Porsche V8 and V6 (Cayenne and Panamera)^[47]
- High severityFrequency: Common1.9 dCiFailures of the Delphi direct-injection injectorsThe engine fault warning light may come on when an injector starts to fail.
Source for the symptom in the 1.9 dCi^[48]
- High severityFrequency: CommonVW 2.0 TFSI EA113Wear of the high-pressure pump cam followerEngine warning light on because of incorrect fuel pressure or mixture.Repair (garage): €250–€900Appears at around 90,000 km
Source for the symptom in the VW 2.0 TFSI EA113^[49]
- Critical severityFrequency: Occasional1.0 PureTechDegradation of the oil-bath timing beltEngine fault warning light on.Repair (garage): €400–€800
Source for the symptom in the 1.0 PureTech^[11]
- Critical severityFrequency: Occasional2.0 TSI / TFSITiming chain and tensioner wearThe engine fault warning light may come on if the ECU detects that the camshaft and crankshaft have lost synchronisation.
Source for the symptom in the 2.0 TSI / TFSI^[50]
- Critical severityFrequency: Occasional1.6 / 2.2 i-DTECDiesel injector wear or failureThe engine fault warning light may come on if the ECU detects an injector out of range.Appears at around 70,000 km
Source for the symptom in the 1.6 / 2.2 i-DTEC^[51]
- Critical severityFrequency: Occasional1.6 GDI / T-GDILow-speed pre-ignition and connecting rod damage in the 1.6 T-GDI (documented in the US)Engine fault warning light, often with the knock sensor code (P1326) stored in the ECU.Appears at around 100,000 km
Source for the symptom in the 1.6 GDI / T-GDI^[52][53]
- Critical severityFrequency: OccasionalM270/M274Camshaft breakage due to a defective weld (2015 units)The engine warning light may come on if the ECU detects the timing offset caused by the breakage.
Source for the symptom in the M270/M274^[54][55]
- Critical severityFrequency: OccasionalOM642Rear timing chain wear and tensioner failureFault code for a mismatch between the crankshaft and camshafts once the chain has stretched appreciably.Repair (garage): €3,500–€5,000Appears at around 300,000 km
Source for the symptom in the OM642^[30]
- Critical severityFrequency: Occasional1.4 TurboEarly engine failure from a cracked pistonEngine fault warning light on before the final failure.Appears at around 13,000 km
Source for the symptom in the 1.4 Turbo^[56]
- Critical severityFrequency: OccasionalPorsche V8 and V6 (Cayenne and Panamera)Cylinder bore scoring in the Cayenne 4.5 V8 blockMisfires that are not fixed by changing coils; Car Mechanics cites them alongside the knocking.
Source for the symptom in the Porsche V8 and V6 (Cayenne and Panamera)^[57]
- Critical severityFrequency: Occasional1.4/1.6 VTiWear of the timing chain and tensionerEngine fault warning light on if the control unit detects a loss of synchronisation between the crankshaft and the camshafts.
Source for the symptom in the 1.4/1.6 VTi^[34]
- Critical severityFrequency: Occasional0.9 TCeTiming chain or tensioner failureThe fault can switch on the engine warning light.
Source for the symptom in the 0.9 TCe^[58]
- Critical severityFrequency: Occasional1.0 TCe / SCeLPG (ECO-G) system faults and tank recallWarning light on, which the sources associate with gas injection defects.
Source for the symptom in the 1.0 TCe / SCe^[59]
- Critical severityFrequency: Occasional2.0 dCiTiming chain wear or breakageThe engine fault warning light may come on if the control unit detects that the camshaft has gone out of sync with the crankshaft.
Source for the symptom in the 2.0 dCi^[60]
- Medium severityFrequency: Very frequent1.5 BlueHDiAdBlue tank and pump failureEngine fault message on the on-board computer asking you to have the vehicle repaired.Repair: €1,000–€1,500
Source for the symptom in the 1.5 BlueHDi^[61][62]
- Medium severityFrequency: Very frequent2.0 HDiAdBlue tank crystallisation and failures (BlueHDi)Engine fault or anti-pollution warning light.Repair (garage): €800–€1,200
Source for the symptom in the 2.0 HDi^[63]
- Medium severityFrequency: Very frequent2.0 TSI / TFSICarbon build-up on the intake valvesThe engine fault warning light may come on if the ECU detects misfires resulting from poor airflow into the engine.
Source for the symptom in the 2.0 TSI / TFSI^[64]
- Medium severityFrequency: Very frequent1.4 HDiInjectors that lose their seal and let diesel escapeEngine fault warning light if the leak affects combustion in that cylinder.
Source for the symptom in the 1.4 HDi^[65]
- Medium severityFrequency: Very frequent2.0 BlueHDiAdBlue (SCR) tank and pump failureEngine fault or emissions warning light linked to the SCR system fault.Repair: €1,000–€1,500
Source for the symptom in the 2.0 BlueHDi^[63]
- Medium severityFrequency: Very frequent1.4 and 1.6 16vIgnition coil failureEngine fault warning light on when the ECU detects a misfire in the corresponding cylinder.Appears at around 30,000 km
Source for the symptom in the 1.4 and 1.6 16v^[66]
- Medium severityFrequency: Very frequent2.0/2.2 D-4DEGR valve clogged with sootThe engine warning light comes on when the ECU detects that the EGR valve is not closing or opening correctly.Appears at around 45,000 km
Source for the symptom in the 2.0/2.2 D-4D^[67]
- Medium severityFrequency: Very frequent1.9 TDIEGR valve clogged with carbonThe engine warning light can come on when the ECU detects that the EGR valve is not responding normally.Repair (garage): €350–€450Appears at around 50,000 km
Source for the symptom in the 1.9 TDI^[68]
- High severityFrequency: Occasional1.2 PureTechSpark plug breakage on the 130 hp 1.2 PureTech turboEngine warning light for ignition faults when a spark plug deteriorates; fiches-auto.fr links these to a heavily carboned engine.
Source for the symptom in the 1.2 PureTech^[69]
- High severityFrequency: Occasional2.0 TDITurbo with seized vanes or premature failureJerking and engine fault light when the variable geometry stops responding.Repair (garage): €1,000
Source for the symptom in the 2.0 TDI^[70]
- High severityFrequency: Occasional1.3 MultijetInjector and high-pressure pump wear from contaminated fuelEngine warning light on when the ECU detects a rail pressure out of range.Repair (garage): €600–€1,200
Source for the symptom in the 1.3 Multijet^[71]
- High severityFrequency: Occasional1.6 CRDiPremature variable-geometry turbo (VGT) failureEngine fault light because of the loss of boost pressure.Appears at around 30,000 km
Source for the symptom in the 1.6 CRDi^[24]
- High severityFrequency: Occasional1.6 CRDiFuel pressure regulator and injectors sensitive to diesel qualityEngine fault light because of fuel pressure out of range.
Source for the symptom in the 1.6 CRDi^[24]
- High severityFrequency: Occasional1.3 TCeTurbo actuator (wastegate) faultInjection warning light on along with the loss of power.Repair (garage): €400–€700
Source for the symptom in the 1.3 TCe^[72]
- High severityFrequency: OccasionalAudi 3.0 TFSI V6Timing chain stretch and tensioner wearEngine warning light with codes P0016, P0017 or P0018 for camshaft position relative to the crankshaft.
Source for the symptom in the Audi 3.0 TFSI V6^[73][74]
- High severityFrequency: Occasional2.0 / 2.4 i-VTECCamshaft wear and pitting on the 2.0 K20 (Accord VII, CR-V II, Civic)The engine warning light may come on.
Source for the symptom in the 2.0 / 2.4 i-VTEC^[75]
- High severityFrequency: Occasional2.2 i-CTDiDiesel injector failure or wearThe engine warning light can come on if the ECU detects an injector outside the expected parameters.Appears at around 86,000 km
Source for the symptom in the 2.2 i-CTDi^[76]
- High severityFrequency: Occasional1.0 T-GDIWear and progressive failure of the turbochargerEngine warning light on if the ECU detects boost pressure out of range, something typical of any turbo engine with electronic wastegate management like this one.
Source for the symptom in the 1.0 T-GDI^[77][78]
- High severityFrequency: OccasionalOM654Wear of the turbocharger and charge-air intercoolerEngine fault warning light if the boost pressure strays outside the expected values.Appears at around 74,000 km
Source for the symptom in the OM654^[79]
- High severityFrequency: Occasional1.4 TurboWhistling, loss of power and turbocharger wearThe engine fault warning light may come on if the control unit detects a boost pressure out of range.Appears at around 75,000 km
Source for the symptom in the 1.4 Turbo^[80]
- High severityFrequency: OccasionalPorsche V8 and V6 (Cayenne and Panamera)Loosening of the camshaft adjuster boltsThe engine warning light comes on when the adjuster fails.
Source for the symptom in the Porsche V8 and V6 (Cayenne and Panamera)^[81]
- High severityFrequency: OccasionalPorsche V8 and V6 (Cayenne and Panamera)Timing chain and tensioner wear on the 4.8 V8Camshaft position codes (P0016 to P0019) when the chain has stretched.
Source for the symptom in the Porsche V8 and V6 (Cayenne and Panamera)^[47]
- High severityFrequency: Occasional2.0 BlueHDiInjector and high-pressure pump wearEngine fault warning light because the rail pressure is out of range.
Source for the symptom in the 2.0 BlueHDi^[40]
- High severityFrequency: Occasional2.2 HDiTurbo faults, somewhat more frequent on the sequential twin-turbo versionsEngine fault warning light on.
Source for the symptom in the 2.2 HDi^[82]
- High severityFrequency: OccasionalE-Tech HíbridoStalling and injection warnings on the 1.2 E-Tech 200 (HR12)An "injection to be checked" warning on the instrument panel.
Source for the symptom in the E-Tech Híbrido^[83]
- High severityFrequency: Occasional2.3 dCi (M9T)Clogged or broken EGR valve damaging the turboEngine warning light on.Repair (garage): €1,200–€2,300
Source for the symptom in the 2.3 dCi (M9T)^[84]
- High severityFrequency: Occasional1.8 HybridEGR cooler leak into the intake and risk to the head gasketOne reported case of an EGR valve replaced under warranty at 62,000 km.
Source for the symptom in the 1.8 Hybrid^[85]
- High severityFrequency: Occasional1.2 12VCylinder head and valve damage from exhaust gas backflow (Volkswagen Polo IV)Engine warning light if the exhaust valve loses its seal or is damaged.Appears at around 24,000 km
Source for the symptom in the 1.2 12V^[86]
- High severityFrequency: Occasional3.0 TDI V6Injector wear (needle seat) and injection faultsInjector control codes P0201 to P0206, according to a specialist workshop.
Source for the symptom in the 3.0 TDI V6^[87]
- Medium severityFrequency: Common1.6 HDiJerking and injection faults on the 1.6 e-HDi 112/115 (Continental injectors)Engine fault warning light on.
Source for the symptom in the 1.6 HDi^[38]
- Medium severityFrequency: CommonBMW N47Clogged or seized EGR valveEngine warning light on with a code related to the flow of recirculated exhaust gases.Repair (garage): €400–€1,500
Source for the symptom in the BMW N47^[14]
- Medium severityFrequency: Common1.3 MultijetEGR valve blocked by sootEngine warning light on when the ECU detects that the valve is not responding as expected.Repair (garage): €130–€400
Source for the symptom in the 1.3 Multijet^[88]
- Medium severityFrequency: Common1.6 CRDiEGR valve blocked by carbon build-upEngine fault light with the code for insufficient exhaust gas recirculation (P0401 or similar).Repair (garage): €200–€450
Source for the symptom in the 1.6 CRDi^[89]
- Medium severityFrequency: Common1.6 dCiBlocked or failed EGR valveEngine fault or emissions warning light on.Repair (garage): €250–€1,000
Source for the symptom in the 1.6 dCi^[90]
- Medium severityFrequency: Common2.0 HDiEGR valve blocked by sootEngine fault warning light on.Repair (garage): €200–€350
Source for the symptom in the 2.0 HDi^[91]
- Medium severityFrequency: CommonBMW N43/N46Injector, ignition coil and NOx sensor failures (N43)Engine warning light due to failures of the injectors, coils or NOx sensor, all three documented on the N43.
Source for the symptom in the BMW N43/N46^[92]
- Medium severityFrequency: CommonBMW N54/N55N54 piezoelectric injector failureEngine warning light with misfires.
Source for the symptom in the BMW N54/N55^[93][94]
- Medium severityFrequency: Common1.4 T-JetMultiAir (UniAir) electro-hydraulic unit failureThe engine warning light comes on when the ECU detects a misfire linked to valve control.Repair: €1,250–€1,800Appears at around 12,000 km
Source for the symptom in the 1.4 T-Jet^[43]
- Medium severityFrequency: Common1.6 and 2.0 MultiJet IIEGR valve blocked by soot in urban useEngine fault warning light on when the ECU detects that the EGR is not responding as expected.Repair (garage): €200–€500
Source for the symptom in the 1.6 and 2.0 MultiJet II^[95]
- Medium severityFrequency: Common1.9 JTD/Multijet and 2.4 JTDEGR valve blocked by carbonEngine warning light on when the ECU detects that the valve is not responding as expected.Repair (garage): €130–€800Appears at around 80,000 km
Source for the symptom in the 1.9 JTD/Multijet and 2.4 JTD^[96]
- Medium severityFrequency: Common1.6 GDI / T-GDICarbon build-up on the intake valvesEngine fault warning light if the carbon causes misfires.
Source for the symptom in the 1.6 GDI / T-GDI^[97]
- Medium severityFrequency: Common1.7 CRDiEGR valve clogged with carbon depositsEngine or emissions warning light on.Repair (garage): €60–€350
Source for the symptom in the 1.7 CRDi^[98]
- Medium severityFrequency: Common1.1 and 1.4 CRDiEGR valve clogged with carbon depositsEngine warning light because of out-of-range gas recirculation.
Source for the symptom in the 1.1 and 1.4 CRDi^[99]
- Medium severityFrequency: CommonM111Camshaft adjuster oil leak into the wiringEngine fault warning light or erratic electrical behaviour if the oil ends up affecting the connector or, in the worst case, the control unit.
Source for the symptom in the M111^[100]
- Medium severityFrequency: CommonM271Oil leaking from the camshaft adjuster solenoids into the wiringEngine fault warning light or erratic electrical behaviour if the oil affects the connector contacts or, in the worst case, the control unit.
Source for the symptom in the M271^[28]
- Medium severityFrequency: CommonM271Crankcase ventilation hose under the supercharger: it cracks and lets in false airEngine fault warning light with mixture-related codes when false air enters through the cracked hose.
Source for the symptom in the M271^[28]
- Medium severityFrequency: CommonM272/M273Broken flaps and lever in the variable intake manifoldCodes P2004, P2005 and P2006 due to the swirl flaps.
Source for the symptom in the M272/M273^[101]
- Medium severityFrequency: CommonM270/M274Oil leaking from the camshaft adjuster into the electrical connector (M274)Engine warning light or erratic electrical behaviour if the oil reaches the connector contacts or, in the worst case, the ECU.
Source for the symptom in the M270/M274^[54]
- Medium severityFrequency: Common2.0 CDI (OM640)EGR valve clogged with sootEngine fault warning light on because of a code relating to the EGR circuit.
Source for the symptom in the 2.0 CDI (OM640)^[102]
- Medium severityFrequency: Common2.2 CDI (OM646)EGR valve clogged or seized by sootEngine fault warning light with a code relating to the EGR circuit.
Source for the symptom in the 2.2 CDI (OM646)^[103]
- Medium severityFrequency: Common2.5 dCi YD25EGR valve clogged with carbonEngine warning light on.
Source for the symptom in the 2.5 dCi YD25^[104]
- Medium severityFrequency: Common1.0/1.2/1.4 EcotecIgnition coil failureEngine warning light on because of the misfire detected on one cylinder.Repair (garage): €150–€480Appears at around 15,000 km
Source for the symptom in the 1.0/1.2/1.4 Ecotec^[33][105]
- Medium severityFrequency: Common1.4 TurboIgnition coil failureEngine fault warning light on because of the misfire detected in one cylinder.Repair (garage): €400–€600Appears at around 47,000 km
Source for the symptom in the 1.4 Turbo^[106]
- Medium severityFrequency: Common2.0 DTI and 2.2 DTIClogged or faulty EGR valveThe engine fault warning light may come on when the ECU detects an EGR valve fault.
Source for the symptom in the 2.0 DTI and 2.2 DTI^[107]
- Medium severityFrequency: Common2.0 CDTISoot build-up in the injectors and EGR valveThe engine warning light may come on when the ECU detects an injection or EGR valve fault.
Source for the symptom in the 2.0 CDTI^[108]
- Medium severityFrequency: Common1.4 and 1.6 TU3/TU5Ignition coils that fail and cause jerkingThe engine warning light comes on, and sometimes flashes, when the misfire is pronounced.Appears at around 40,000 km
Source for the symptom in the 1.4 and 1.6 TU3/TU5^[109]
- Medium severityFrequency: Common1.6 THPHigh-pressure fuel pump (HPFP) failure on the turbo versionsEngine warning light on because of a code related to fuel pressure.
Source for the symptom in the 1.6 THP^[34]
- Medium severityFrequency: Common1.9 dCiEGR valve blocked by soot build-upThe engine fault warning light may come on when the EGR valve gets stuck.
Source for the symptom in the 1.9 dCi^[48]
- Medium severityFrequency: Common2.0 dCiEGR valve blockageEngine fault warning light on when the control unit detects that the valve is not responding to open or close commands.
Source for the symptom in the 2.0 dCi^[110]
- Medium severityFrequency: Common1.2 16vIgnition coil failure (misfires, engine warning light)Engine warning light on when a coil fails.
Source for the symptom in the 1.2 16v^[66]
- Medium severityFrequency: Common1.4 and 1.6 16vCrankshaft position sensor failureEngine fault warning light on when the ECU registers the sensor failure.
Source for the symptom in the 1.4 and 1.6 16v^[111]
- Medium severityFrequency: Common1.3, 1.5 and 1.6 gasolina (serie M)Faulty catalytic converter and lambda sensors on the 2005-2010 Swift (engine warning light)Gebrauchtwagenberater.de identifies the engine light coming on as the sign of catalytic converter failure; 1.6 owners attribute it to the second lambda sensor or to code P0420.
Source for the symptom in the 1.3, 1.5 and 1.6 gasolina (serie M)^[112][113]
- Medium severityFrequency: Common1.4 D-4DInjector wear and failureThe engine warning light comes on when the control unit detects that an injector is spraying badly.
Source for the symptom in the 1.4 D-4D^[114]
- Medium severityFrequency: Common2.0/2.2 D-4DInjector wear and failureThe warning light comes on when the ECU detects an injector that is spraying badly or dripping.Appears at around 30,000 km
Source for the symptom in the 2.0/2.2 D-4D^[115]
- Medium severityFrequency: CommonD4/D5Clogged EGR valve or EGR cooler leaking into the intakeEngine warning light for a code from the EGR valve or circuit.
Source for the symptom in the D4/D5^[35]
- Medium severityFrequency: CommonD4/D5DPF (particulate filter) blockage and incomplete regenerationsEngine warning light linked to a DPF pressure sensor fault.
Source for the symptom in the D4/D5^[35]
- Medium severityFrequency: Common1.4 16v and 1.6 MPI/FSIIgnition coil failureThe engine warning light comes on, sometimes intermittently, when a coil fails.
Source for the symptom in the 1.4 16v and 1.6 MPI/FSI^[68]
- Medium severityFrequency: Common1.4 16v and 1.6 MPI/FSICarbon build-up on the intake valves (1.6 FSI only)The engine warning light may come on if the ECU detects an incorrect mixture caused by the blockage.
Source for the symptom in the 1.4 16v and 1.6 MPI/FSI^[116]
- Medium severityFrequency: Common2.0 FSIIgnition coil failureThe engine warning light comes on when a coil fails.
Source for the symptom in the 2.0 FSI^[117]
- Critical severityFrequency: Rare1.5 BlueHDiDiesel leak at the common rail (2026 recall)Engine warning light on.Repair: €0
Source for the symptom in the 1.5 BlueHDi^[118]
- Critical severityFrequency: Rare1.6 GDI / T-GDIPiston and connecting rod damage from catalytic converter overheating in the naturally aspirated 1.6 GDIEngine fault warning light due to abnormal combustion or misfire.
Source for the symptom in the 1.6 GDI / T-GDI^[119]
- Critical severityFrequency: Rare2.2/2.5 dCiTiming chain wearThe engine warning light can come on if the ECU detects that the camshaft has gone out of sync with the crankshaft.
Source for the symptom in the 2.2/2.5 dCi^[120]
- Medium severityFrequency: Occasional1.2 and 1.4 TSITurbo wastegate actuator failureFault codes for the boost pressure actuator (for example, P334A).
Source for the symptom in the 1.2 and 1.4 TSI^[121]
- Medium severityFrequency: Occasional1.0 EcoBoostMisfires and engine warning light caused by the wiring harnessEngine warning light on, with misfire codes stored in the ECU.
Source for the symptom in the 1.0 EcoBoost^[122]
- Medium severityFrequency: Occasional1.3 TCeEmissions warning light on because of a calibration faultInjection or engine fault warning light on.Repair: €100
Source for the symptom in the 1.3 TCe^[72]
- Medium severityFrequency: Occasional1.3 TCeTiming phaser faultInjection warning light on.
Source for the symptom in the 1.3 TCe^[72]
- Medium severityFrequency: Occasional1.6 dCiInjector failuresEngine fault warning light on.Repair (garage): €250–€1,700
Source for the symptom in the 1.6 dCi^[123]
- Medium severityFrequency: Occasional2.2 JTDm Multijet IIClogged particulate filter (DPF) and EGR valve with depositsEngine light from intake and exhaust system sensors: two particulate sensors and two faulty mass airflow sensors in a 160 hp Stelvio, and particulate sensors replaced several times in a 210 hp one before the control unit was replaced.
Source for the symptom in the 2.2 JTDm Multijet II^[124]
- Medium severityFrequency: OccasionalBMW N13High-pressure fuel pump (HPFP) failureEngine warning light on due to a fuel-pressure-related code.
Source for the symptom in the BMW N13^[25]
- Medium severityFrequency: OccasionalBMW N20High-pressure fuel pump (HPFP) failureEngine fault warning light on from a code related to fuel pressure.
Source for the symptom in the BMW N20^[125]
- Medium severityFrequency: Occasional1.2 8v FireSensor failures: lambda sensor and crankshaft position sensor (TDC)Engine warning light on, associated in the documented cases with the lambda sensor.
Source for the symptom in the 1.2 8v Fire^[126][127]
- Medium severityFrequency: Occasional1.4 T-JetMisfires and ignition coil faultsThe engine warning light comes on due to misfires linked to the coils or other ignition components.
Source for the symptom in the 1.4 T-Jet^[128]
- Medium severityFrequency: Occasional1.6 and 2.0 MultiJet IIInjector faults and DPF particulate sensor failureEngine fault warning light on due to a fault in the injection system or the DPF particulate sensor.
Source for the symptom in the 1.6 and 2.0 MultiJet II^[129]
- Medium severityFrequency: Occasional2.3 MultiJetEGR valve and throttle body clogged by carbon deposits and moistureEngine warning light coming on intermittently on the Euro 6 with limp mode.
Source for the symptom in the 2.3 MultiJet^[130]
- Medium severityFrequency: Occasional2.3 MultiJetIntercooler hose coming off the intake throttle bodyThe engine management warning light comes on when the hose comes off.
Source for the symptom in the 2.3 MultiJet^[131]
- Medium severityFrequency: Occasional0.9 TwinAir and 1.0/1.3 FireFlyMultiAir/UniAir hydraulic unit failure (0.9 TwinAir)A MultiAir unit fault commonly turns on the engine warning light, although the source consulted does not state this explicitly for the documented case.
Source for the symptom in the 0.9 TwinAir and 1.0/1.3 FireFly^[127]
- Medium severityFrequency: Occasional1.25/1.4/1.6 Ti-VCTTi-VCT actuator or solenoid valve failure on the early unitsThe engine warning light may come on when the control unit detects that the variable timing is out of range.
Source for the symptom in the 1.25/1.4/1.6 Ti-VCT^[132]
- Medium severityFrequency: Occasional1.2 / 1.4 / 1.8 i-VTECSpark plug working loose on the 1.4 i-VTEC engineThe engine warning light can come on for a misfire in the affected cylinder when the spark plug loses its tightness.
Source for the symptom in the 1.2 / 1.4 / 1.8 i-VTEC^[51]
- Medium severityFrequency: Occasional2.2 i-CTDiClogged or faulty EGR valveOn the Accord, several owners describe the engine warning light coming on intermittently, with the car entering a limited operating mode.
Source for the symptom in the 2.2 i-CTDi^[133]
- Medium severityFrequency: Occasional1.1 and 1.4 CRDiCarbon build-up on the common-rail injectorsEngine warning light because of uneven combustion.
Source for the symptom in the 1.1 and 1.4 CRDi^[134]
- Medium severityFrequency: Occasional2.0 / 2.4 GDI and T-GDI (Theta II)Carbon build-up on the intake valves of direct-injection Theta II enginesEngine warning light on when the deposits are already causing misfires.
Source for the symptom in the 2.0 / 2.4 GDI and T-GDI (Theta II)^[97]
- Medium severityFrequency: Occasional2.2 TD4 / SD4Diesel particulate filter (DPF) clogged by urban useEngine fault warning light on.
Source for the symptom in the 2.2 TD4 / SD4^[135]
- Medium severityFrequency: OccasionalSkyactiv-GIntake shut-off valve software issue and engine stallingThe ECU irregularity usually turns on the engine warning light before or during the failure.
Source for the symptom in the Skyactiv-G^[136]
- Medium severityFrequency: OccasionalM112 / M113Crankshaft position sensor failureThe engine warning light may come on and the code P0335 may be stored in the fault memory, according to the same general guide.
Source for the symptom in the M112 / M113^[137]
- Medium severityFrequency: OccasionalOM656NOx sensor failure and AdBlue (SCR) system warningsUnexpected warning messages on the dashboard when the exhaust aftertreatment is not working as it should.
Source for the symptom in the OM656^[138]
- Medium severityFrequency: OccasionalOM656EGR valve clogged with soot after short journeysWarning messages on the instrument cluster.
Source for the symptom in the OM656^[138]
- Medium severityFrequency: Occasional1.8/2.2 DI-DSoot fouling of injectors and EGR valveThe engine fault warning light comes on when the ECU detects an injector or an EGR valve out of range.
Source for the symptom in the 1.8/2.2 DI-D^[139]
- Medium severityFrequency: OccasionalMitsubishi PHEVSpark plugs and petrol engine software on the Outlander PHEV (campaign R3033111)The engine fault warning light comes on, the instrument cluster shows a message and the control unit stores fault codes.
Source for the symptom in the Mitsubishi PHEV^[131]
- Medium severityFrequency: Occasional1.6 DIG-TTiming chain wear and noiseEngine warning light if the slack reaches the point of affecting timing and the ECU detects a deviation in the camshafts.
Source for the symptom in the 1.6 DIG-T^[140]
- Medium severityFrequency: Occasional2.2/2.5 dCiClogged EGR valveThe engine warning light can come on when the ECU detects that the valve is not responding to open or close commands.
Source for the symptom in the 2.2/2.5 dCi^[120]
- Medium severityFrequency: Occasional1.7 CDTIPremature alternator wearBattery or charging warning light on the dashboard when the alternator starts to fail.
Source for the symptom in the 1.7 CDTI^[141]
- Medium severityFrequency: Occasional2.0 CDTICharge air hose cracked or loose on the 2.0 CDTI in the Insignia AIn some cases the engine warning light comes on.
Source for the symptom in the 2.0 CDTI^[142][143]
- Medium severityFrequency: Occasional1.4 HDiEGR valve clogged with carbonEngine fault warning light on, associated with an EGR valve code.
Source for the symptom in the 1.4 HDi^[65]
- Medium severityFrequency: Occasional1.6 THPSpark plugs and ignition coils that wear out early on the 1.6 THPEngine warning light for combustion misfires; one 308 THP owner describes spark plugs and coils replaced three times in one year.
Source for the symptom in the 1.6 THP^[144]
- Medium severityFrequency: Occasional2.0 BlueHDiEGR valve blocked by carbon depositsEngine fault warning light on.Repair (garage): €200–€350
Source for the symptom in the 2.0 BlueHDi^[91]
- Medium severityFrequency: Occasional2.0 and 2.2 16v EW10/EW12Faulty ignition coilsThe engine warning light comes on; on the 2.0 of the Citroën C8 the page links it to a faulty coil or ignition rail.
Source for the symptom in the 2.0 and 2.2 16v EW10/EW12^[145]
- Medium severityFrequency: Occasional1.0 SCe (B4D)Jerking, rough idle or warning light from sensors and ignition coilsEngine fault warning light on, associated in the documented cases with the lambda sensor or the ignition coil.
Source for the symptom in the 1.0 SCe (B4D)^[146]
- Medium severityFrequency: Occasional1.4 and 1.6 8vIgnition coil failureEngine warning light on when the ECU detects a misfire in the corresponding cylinder.
Source for the symptom in the 1.4 and 1.6 8v^[66]
- Medium severityFrequency: Occasional2.2 dCi and 3.0 dCi V6Blocked EGR valve and turbo and injector faults on the 2.2 dCi (G9T)Engine warning light and starting problems when an injector or the rail fails, as in a Laguna II at around 98,000 km.
Source for the symptom in the 2.2 dCi and 3.0 dCi V6^[147]
- Medium severityFrequency: Occasional1.2 16vProbe and sensor faults (crankshaft position, throttle body)Engine warning light on because of a probe or sensor fault.
Source for the symptom in the 1.2 16v^[66][148]
- Medium severityFrequency: Occasional2.0 16v F4R and F4RTF4RT ignition coil failurePossible engine warning light due to a misfire.
Source for the symptom in the 2.0 16v F4R and F4RT^[149]
- Medium severityFrequency: Occasional2.3 dCi (M9T)Faulty injectors on the 2.3 dCiInjection or engine warning on the dashboard.Repair (garage): €400–€1,800
Source for the symptom in the 2.3 dCi (M9T)^[150]
- Medium severityFrequency: Occasional1.2 TurboManufacturing defect in the ignition coils (early units)A coil failure causes misfires that switch on the engine warning light, steady or flashing depending on severity.
Source for the symptom in the 1.2 Turbo^[151]
- Medium severityFrequency: Occasional1.2 TurboSudden loss of power (turbo, injection or sensors)It may be accompanied by the engine warning light if the ECU records the anomaly.
Source for the symptom in the 1.2 Turbo^[152]
- Medium severityFrequency: Occasional1.33 Dual VVT-iHard cold starting and fault code P1604The engine fault warning light may come on with code P1604 stored in the control unit.
Source for the symptom in the 1.33 Dual VVT-i^[153]
- Medium severityFrequency: Occasional1.4 D-4DEGR valve clogged with sootThe warning light comes on when the control unit detects that the EGR is not closing or opening accurately.Appears at around 189,000 km
Source for the symptom in the 1.4 D-4D^[154]
- Medium severityFrequency: OccasionalD5 5 cilindrosEGR valve and EGR cooler clogged with carbonPossible engine fault warning.Repair (garage): €350–€700
Source for the symptom in the D5 5 cilindros^[155]
- Medium severityFrequency: OccasionalDrive-E gasolinaCarbon build-up on injectors and intake valves due to direct injectionThe engine warning light may come on because of misfires associated with carbon on the valves or injectors.
Source for the symptom in the Drive-E gasolina^[156]
- Medium severityFrequency: OccasionalDrive-E gasolinaRecall over the plastic intake manifoldThe engine warning light may come on if the deformed manifold disturbs the measurement or the intake flow.
Source for the symptom in the Drive-E gasolina^[157][158]
- Medium severityFrequency: Occasional1.0 MPICooling system fault with engine light and vibrationsEngine warning light on, described in the documented Škoda Citigo case.
Source for the symptom in the 1.0 MPI^[159]
- Medium severityFrequency: Occasional3.0 TDI V6Worn intake flaps (swirl) and intake manifoldEngine warning light on with code P3134 (intake manifold flap, bank 1).
Source for the symptom in the 3.0 TDI V6^[160]
- High severityFrequency: Rare1.2 PureTechTiming misalignment from the camshaft sprocket bolts (chain-driven generation)Engine warning light with codes P0012, P0015, P0016 or P0017.
Source for the symptom in the 1.2 PureTech^[69]
- High severityFrequency: Rare1.5 BlueHDiWater pump sprocket slipping and belt misalignment (2026 recall)Warning lights on.Repair: €0
Source for the symptom in the 1.5 BlueHDi^[161]
- High severityFrequency: RareM260Cylinder head wear and cylinder misfires (M260, isolated case)Combustion misfires recorded in the diagnosis (codes P0300 and P0302, cylinder 2).Repair: €6,000
Source for the symptom in the M260^[162]
- Low severityFrequency: CommonSkyactiv-GCarbon build-up in the intake manifold and injectorsA misfire or uneven combustion from dirty injectors can turn on the engine warning light.
Source for the symptom in the Skyactiv-G^[163]
- Low severityFrequency: CommonM111Mass air flow sensor failureThe engine fault warning light may come on when the control unit detects an inconsistent reading from the air flow meter.
Source for the symptom in the M111^[164]
- Low severityFrequency: CommonM270/M274NOx sensor failure (code P2200) on the M274Engine warning light with code P2200 stored in the ECU.Repair (garage): €100–€500
Source for the symptom in the M270/M274^[54]
- Low severityFrequency: Common1.4 and 1.6 TU3/TU5Sensors that fail: lambda sensor and temperature sensorThe engine warning light comes on when the ECU detects an inconsistent reading from the lambda sensor or the temperature sensor.Appears at around 25,000 km
Source for the symptom in the 1.4 and 1.6 TU3/TU5^[165]
- Low severityFrequency: Common2.0 and 2.4 VVT-iLambda sensor failure on the 1AZ-FE (RAV4 and Avensis 2.0 VVT-i)Engine warning light on because of a lambda sensor fault.Appears at around 150,000 km
Source for the symptom in the 2.0 and 2.4 VVT-i^[166]
- Low severityFrequency: Common1.2 12VIgnition coil failureEngine warning light on, the most common way for a coil fault to show itself.
Source for the symptom in the 1.2 12V^[86]
- Low severityFrequency: Common1.8 T 20vIgnition coil failureThe engine warning light comes on, sometimes intermittently, when a coil starts to fail.
Source for the symptom in the 1.8 T 20v^[68]
- Medium severityFrequency: Rare1.6 EcoBoostHigh-pressure fuel pump failureThe engine fault warning light may come on when the ECU detects incorrect fuel pressure.
Source for the symptom in the 1.6 EcoBoost^[167]
- Medium severityFrequency: Rare1.0 T3 and 1.3 T4 FireFly TurboJerking and MultiAir block failures on the 1.0 T3The engine warning light comes on and sometimes disappears after restarting once or twice.
Source for the symptom in the 1.0 T3 and 1.3 T4 FireFly Turbo^[168]
- Medium severityFrequency: Rare1.5 / 2.0 EcoBlueEmissions system warnings (AdBlue/EGR) and injector wearEngine fault warning light associated with an injector failure, documented occasionally on the Focus IV.
Source for the symptom in the 1.5 / 2.0 EcoBlue^[169]
- Medium severityFrequency: Rare2.0 and 3.0 Ingenium gasolinaTiming chain and VCT unit noise on the 2.0 petrolCodes P0016 and P0017 for crankshaft-camshaft correlation, which the workshop cites as a sign when the tensioner is already worn.
Source for the symptom in the 2.0 and 3.0 Ingenium gasolina^[170]
- Medium severityFrequency: Rare2.4 / 2.8 D-4D (GD)Variable geometry turbo (VNT) seized by sootEngine warning light with boost pressure codes (P2562, P2563 according to the guide).
Source for the symptom in the 2.4 / 2.8 D-4D (GD)^[171]
- Medium severityFrequency: RareD4/D5Breakage of the intake manifold swirl flap (5-cylinder)The engine warning light may come on if the intake system detects abnormal flap operation.
Source for the symptom in the D4/D5^[35]
- Low severityFrequency: Occasional1.0 PureTechIgnition coil and spark plug failureEngine warning light on; one 208 owner says the diagnosis pointed to a coil at around 18,000 km.
Source for the symptom in the 1.0 PureTech^[37][172]
- Low severityFrequency: Occasional2.0 TSI / TFSIPCV valve (crankcase ventilation) failureThe engine fault warning light may come on because of an incorrect air-fuel mixture.Repair (garage): €60–€250
Source for the symptom in the 2.0 TSI / TFSI^[173]
- Low severityFrequency: OccasionalAudi 3.0 TFSI V6PCV valve failure (crankcase ventilation)Engine warning light with PCV-related codes, misfires or boost pressure faults.
Source for the symptom in the Audi 3.0 TFSI V6^[74][174]
- Low severityFrequency: Occasional1.2 8v FireFaulty ignition coil (misfire, engine warning light)Engine warning light on due to a misfire.
Source for the symptom in the 1.2 8v Fire^[127]
- Low severityFrequency: Occasional1.25/1.4/1.6 Ti-VCTMisfires from coils or spark plugsA misfire usually turns on the engine warning light, sometimes intermittently.Appears at around 60,000 km
Source for the symptom in the 1.25/1.4/1.6 Ti-VCT^[132]
- Low severityFrequency: Occasional1.5 VTi-TECH / T-GDIElectronic warnings and occasional sensor faults (MG HS)Warning lights on because of faults logged by a sensor.
Source for the symptom in the 1.5 VTi-TECH / T-GDI^[175]
- Low severityFrequency: Occasional1.6 DIG-TLambda sensor and other engine sensor failuresEngine warning light on, sometimes with the car running apparently normally.
Source for the symptom in the 1.6 DIG-T^[176][177]
- Low severityFrequency: Occasional1.0/1.2/1.4 EcotecFaulty lambda sensors on the 1.2 and 1.4 petrolEngine warning light on due to a faulty lambda sensor, sometimes together with other sensor faults.
Source for the symptom in the 1.0/1.2/1.4 Ecotec^[105][178]
- Low severityFrequency: Occasional1.6 and 1.8 Ecotec 16vIgnition coil failuresThe engine warning light comes on (steady or flashing) as ignition fails in one or more cylinders.
Source for the symptom in the 1.6 and 1.8 Ecotec 16v^[179][180]
- Low severityFrequency: Occasional1.4 and 1.6 16vFaulty lambda sensors on the 1.6 16V (K4M)Engine warning light on and misfires when the sensor fails, according to Fiches-auto.fr.
Source for the symptom in the 1.4 and 1.6 16v^[181][182]
- Low severityFrequency: Occasional2.2 MultiJet / BlueHDi (Stellantis)AdBlue (SCR) system: the warning light may not come on if the urea doser failsThe problem is the absence of a warning: the malfunction indicator (MIL) may not come on even though the urea injector has stopped working or the SCR or particulate filter diagnostics fail.
Source for the symptom in the 2.2 MultiJet / BlueHDi (Stellantis)^{[131][183][184][185]}
- Low severityFrequency: Occasional1.0 VVT-iFaulty lambda sensor (P0420 code) on the 1.0 VVT-iEngine warning light on with code P0420 (catalytic converter efficiency below threshold) in the fault memory.
Source for the symptom in the 1.0 VVT-i^[186][187]
- Low severityFrequency: Occasional1.4, 1.6 and 1.8 VVT-iAir mass meter and lambda sensor failuresThe engine warning light comes on when the ECU detects an out-of-range reading from the air mass meter or the lambda sensor.
Source for the symptom in the 1.4, 1.6 and 1.8 VVT-i^[188]
- Low severityFrequency: Occasional1.6 Dual VVT-iIgnition coil failureThe engine warning light comes on, sometimes intermittently, because of the failure of one of the coils.Appears at around 36,600 km
Source for the symptom in the 1.6 Dual VVT-i^[189]
- Low severityFrequency: OccasionalVolvo 5 cilindros gasolinaFaulty ignition coils with misfiresThe engine fault light may come on and the idle may become uneven.Repair (garage): €120–€300
Source for the symptom in the Volvo 5 cilindros gasolina^[190]
- Low severityFrequency: Occasional1.4 16v and 1.6 MPI/FSIFaulty lambda sensors on the 1.6 FSIEngine warning light on; the source links the sensor to this warning together with the catalytic converter.
Source for the symptom in the 1.4 16v and 1.6 MPI/FSI^[191]
- Low severityFrequency: Occasional2.0 FSIBlocked EGR valveIt is common for an EGR valve fault to light the engine warning lamp; the sources cited do not detail the exact warning, so read the codes with diagnostics.
Source for the symptom in the 2.0 FSI^[192]
- Low severityFrequency: Rare1.2 Dualjet and 1.2 VVTIgnition coil: no documented pattern of faultsThis would be the expected symptom of a coil or ignition fault, but none of the sources consulted for this engine describe it.
Source for the symptom in the 1.2 Dualjet and 1.2 VVT^[193][194]
- Low severityFrequency: Rare1.0 MPIOccasional sensor or throttle body faults (isolated cases)Engine warning light on, the usual way a sensor or throttle body fault shows itself.
Source for the symptom in the 1.0 MPI^[195]

Faults elsewhere in the car that cause it

Suspension, brake, electronics and other faults on specific cars, from most to least important.

- High severityFrequency: OccasionalHyundai Tucson IBrake light switch failure from burnt contacts (2007 to 2009 Tucson)The DVSA adds that the engine fault warning light may come on, as well as affecting the cruise control and gear selection on automatics.
Source for the symptom in the Hyundai Tucson I^[131]
- High severityFrequency: OccasionalJaecoo 7Loose ECU wiring harness: engine warning light and stallingEngine warning light on.Repair: €0
Source for the symptom in the Jaecoo 7^[196]
- High severityFrequency: OccasionalKia Optima IIIIntermittent brake light failure caused by a carbonised switchAccording to the DVSA, the switch failure can affect other systems, including the engine warning light.
Source for the symptom in the Kia Optima III^[131]
- High severityFrequency: OccasionalKia Sportage IIBrake light switch failureAccording to the DVSA, the same switch fault can also affect stability control (ESC), cruise control and gear selection in automatic gearboxes, and can turn on the engine warning light.
Source for the symptom in the Kia Sportage II^[131][197]
- Medium severityFrequency: OccasionalJeep Wrangler JLInstrument cluster software: engine warning light may not come onThe problem is the absence of a warning: when a fault that should switch on the engine warning light occurs, the driver may not be alerted.
Source for the symptom in the Jeep Wrangler JL^[131]
- High severityFrequency: RareOpel Meriva BEngine wiring harness rubbing against the gearbox: the engine may stall or not start (campaign 15-C-054)The engine fault warning light comes on.
Source for the symptom in the Opel Meriva B^[131][198]

Which cars it appears in

These faults affect 117 engines. We have documented 581 models from 40 makes with some of the affected versions: open yours to see all its faults.

Engines

Cars with the affected versions

Abarth

Cupra

Dacia

See all Dacia models

DS

Fiat

See all Fiat models

Ford

See all Ford models

Honda

See all Honda models

Hyundai

See all Hyundai models

Infiniti

Iveco

Jaguar

Jeep

Kia

See all Kia models

Lancia

Land Rover

Lexus

Lexus IS IIEngine: 2.0/2.2 D-4DYears: 2005–2013

Lotus

Lotus Elise S2Engine: 1.4, 1.6 and 1.8 VVT-iYears: 2006–2010

Mazda

See all Mazda models

Mercedes-Benz

See all Mercedes-Benz models

MG

MG HSEngine: 1.5 VTi-TECH / T-GDIYears: since 2019

MINI

Mitsubishi

Nissan

See all Nissan models

Opel

See all Opel models

Peugeot

See all Peugeot models

Porsche

Renault

See all Renault models

Saab

Saab 9-3Engine: 1.9 JTD/Multijet and 2.4 JTDYears: 2005–2012

Seat

See all Seat models

Škoda

See all Škoda models

Smart

Suzuki

See all Suzuki models

Toyota

See all Toyota models

Volkswagen

See all Volkswagen models

Volvo

See all Volvo models

Engine warning light: causes in your car

584 cars have several documented faults that cause this symptom. Choose yours to see only those that affect it, by engine and by year.

Abarth 2

Alfa Romeo 10

Audi 31

BMW 18

Chrysler 1

Chrysler 300C

Citroën 32

Cupra 3

Dacia 11

DS 6

Fiat 21

Ford 30

Honda 12

Hyundai 17

Infiniti 2

Iveco 3

Jaecoo 1

Jaecoo 7

Jaguar 5

Jeep 5

Kia 22

Lancia 5

Land Rover 8

Lexus 1

Lexus IS II

Lotus 1

Lotus Elise S2

Mazda 14

Mercedes-Benz 55

MG 1

MG HS

MINI 4

Mitsubishi 5

Nissan 16

Opel 33

Peugeot 34

Porsche 4

Renault 40

Saab 1

Saab 9-3

Seat 13

Škoda 17

Smart 2

Suzuki 9

Toyota 29

Volkswagen 36

Volvo 24

Engine warning light by brand

Fault codes that may go with it

If you have an OBD reader, the code stored by the control unit helps you work out which system is failing.

Frequently asked questions

Will a car with the engine warning light on pass the ITV (MOT equivalent)?

No. In the ITV emissions test the warning light is checked: on cars registered since 1 January 2008 it must perform its self-check when the ignition is switched on, and if the diagnostic reading finds it active it is a serious defect. Autofácil, in an article with the opinion of a DEKRA ITV engineer, reports that if it is on at the time of the inspection the car will be rejected.^[4][5]

Can I clear the codes just before the ITV?

It is no use. If the fault history was cleared less than an hour ago, or the car has covered less than a kilometre since the clearing, the ITV also treats it as a serious defect.^[4]

How does the garage know what is wrong with the car?

It connects a diagnostic machine to the OBD port and reads the error codes the control unit has stored. The code points towards the cause (for example, misfires or catalytic converter efficiency), but one code can have several causes: Autodoc Club cites, among the causes of P0420, a faulty oxygen sensor or an exhaust leak.^[1][8][9]

Can it come on because the fuel cap is not closed properly?

Yes. RACE includes a badly closed fuel cap among the seven reasons the light comes on, because it can alter the pressure in the fuel system. If the light appears after refuelling, it is the first thing worth checking.^[1]

Other symptoms: warning lights and alerts

All symptoms

Has this happened to you? Tell us which fault it was, at how many kilometres and how much you paid: it helps other owners know what to expect. Report your fault.

Sources

Every fact on this page links to its source. If you find an error, let us know.

7 razones por las que el testigo de fallo del motor se enciende en un cocheRACE · Motoring press · published 23 June 2026 · consulted 2 October 2026 · in Spanish
Testigo de control de los gases de escapeRACE · Motoring press · published 11 June 2026 · consulted 2 October 2026 · in Spanish
Fallo del motor: guía completa de los símbolos y testigos amarillos en el cocheAutodoc Club · Technical documentation · published 9 September 2026 · consulted 2 October 2026 · in Spanish
Desmontando mitos: ¿puede pasar mi coche la ITV con el testigo de "avería motor" encendido?Diariomotor · Motoring press · published 8 March 2021 · consulted 2 October 2026 · in Spanish
¿Puedes pasar la ITV con un testigo encendido? Nos responde el expertoAutofácil · Motoring press · published 11 September 2025 · consulted 2 October 2026 · in Spanish
Sonda lambda o sensor de oxígeno: síntomas y averíasRACE · Motoring press · published 31 October 2023 · consulted 2 October 2026 · in Spanish
Catalizador de un coche: ¿cómo funciona y qué síntomas de fallo puede dar?RACE · Motoring press · published 8 March 2022 · consulted 2 October 2026 · in Spanish
Código de avería P0420 - guía paso a paso para su diagnóstico y resoluciónAutodoc Club · Technical documentation · consulted 2 October 2026 · in Spanish
Código de avería P0300 - guía paso a paso para su diagnóstico y resoluciónAutodoc Club · Technical documentation · consulted 2 October 2026 · in Spanish
¿Qué precio tiene cambiar una válvula EGR?RACE · Motoring press · published 17 June 2024 · consulted 2 October 2026 · in Spanish
1.2 PureTech: precio y cambio de correa de distribuciónAutopista · Motoring press · published 2 August 2026 · consulted 26 September 2026 · in Spanish
Stellantis llama a revisión al motor diésel 1.5 BlueHDi: ¿cuál es el problema y cuál la solución?coches.com · Motoring press · published 28 July 2025 · consulted 26 September 2026 · in Spanish
Problema en la distribución en motores TSi del Grupo VAGBlog Mecánicos · Other source · published 13 February 2014 · consulted 26 September 2026 · in Spanish
Motor BMW N47: problemas, modelos y qué revisarCarexam · Motoring press · consulted 26 September 2026 · in Spanish
Mercedes OM651 : injecteurs, chaîne, fiabilitéAutoCopilot · Motoring press · published 2026 · consulted 26 September 2026 · in French
Motor BMW M47: problemas y averíasDasercars · Technical documentation · consulted 27 September 2026 · in Spanish
Fiabilité Land Rover Range Rover Evoque (2011-2018), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Fiabilité Jaguar F-Pace, pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Bulletin – Volkswagen 1.4 Piston FailureSouthside Cylinder Heads (taller, Australia) · Other source · published 6 December 2017 · consulted 26 September 2026
Renault 1.2 TCe et Nissan 1.2 DIG-T : des moteurs gourmands en huileL'argus · Motoring press · published 12 October 2016 · consulted 26 September 2026 · in French
Casse moteur Renault 1.2 TCe : 107 000 Renault concernéesL'argus · Motoring press · published 28 March 2019 · consulted 26 September 2026 · in French
5 Signs of BMW N47 Swirl Flap Problems You Can't IgnoreApexx Engines · Technical documentation · consulted 26 September 2026
Kia / Hyundai 1.6 CRDi MHEV Engine FailuresDOHC (especialista en reconstrucción de motores) · Technical documentation · consulted 26 September 2026
Motor Kia y Hyundai 1.6 CRDI (D4FB): ficha tecnica, problemas y tuningMotordinámico · Technical documentation · consulted 26 September 2026 · in Spanish
BMW N13Wikipedia (inglés) · Other source · consulted 27 September 2026
BMW N20Wikipedia (inglés) · Other source · consulted 27 September 2026
2009 Mazda CX-7 engine problemsCarComplaints · Owners' forum · consulted 5 October 2026
Mercedes M271: Typische Probleme und HaltbarkeitGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
M272/M273: Auslassnockenwelle, Kettenrad und Fehlercode P0016Kfz-Meisterbetrieb Dietrich · Technical documentation · consulted 5 October 2026 · in German
Mercedes OM642 : fiabilité, pannes fréquentes et coûts d'entretienAutoCopilot · Motoring press · published 2026 · consulted 26 September 2026 · in French
Fiabilité Mercedes Classe E (2016-2023)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
YD25 Engine Guide: Specs, Reliability, Problems & Buying TipsAutopartswd · Technical documentation · consulted 5 October 2026
Opel Corsa 5 : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Prince engineWikipedia (inglés) · Other source · consulted 27 September 2026
Fiabilité et pannes Volvo XC60 (2008-2017)Fiches-auto.fr · Other source · consulted 27 September 2026 · in French
Fiabilité et pannes de la Seat Ibiza (2008-2017)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Tous les problèmes sur Peugeot 208 2012-2019 (750 témoignages)Fiches-auto.fr · Owners' forum · consulted 26 September 2026 · in French
Fiabilité Citroën Peugeot. Le bloc 1.6 HDi 8 soupapes est-il fiable ? (1.6 HDi 112/115)L'argus · Motoring press · published 23 March 2015 · consulted 26 September 2026 · in French
Mercedes OM651 turbodiésel: ficha técnica, problemas y tuningMotordinámico · Motoring press · consulted 26 September 2026 · in Spanish
Fiabilité du 2.0 HDIFiches-Auto · Motoring press · consulted 27 September 2026 · in French
BMW N53 Engine ProblemsBMW Tuning · Other source · consulted 5 October 2026
Motor BMW N57: problemas, modelos y qué revisarCarexam · Motoring press · consulted 27 September 2026 · in Spanish
Fiat 500X : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiat Tipo : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Opel Zafira B (2005-2014) – Typische Probleme & SchwachstellenGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Fiabilité Nissan Almera : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Porsche Cayenne: typische Probleme und Diagnose (957/958)KFZ Dietrich (taller, Alemania) · Other source · published 15 May 2026 · consulted 9 October 2026 · in German
Achat d'occasion : faut-il éviter le moteur 1.9 dCi F9Q chez Renault ?Planète Renault · Motoring press · published 24 January 2024 · consulted 27 September 2026 · in French
Common problems of Audi A3 8P 2.0 TFSIEuro Auto Pro · Technical documentation · consulted 5 October 2026
Fiabilité Volkswagen (datos de propietarios por modelo)fiches-auto.fr · Reliability study · consulted 26 September 2026 · in French
Fiabilité et pannes Honda Civic (2012-2017)Fiches-auto.fr · Other source · consulted 27 September 2026 · in French
Complaints by vehicle: Hyundai Veloster, model year 2013NHTSA · Official body · consulted 27 September 2026
Complaints by vehicle: Hyundai Tucson, model year 2016NHTSA · Official body · consulted 27 September 2026
Mercedes M274: Typische Probleme & HaltbarkeitGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Mercedes M270: Typische Probleme & HaltbarkeitGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Opel Astra 5 : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Buying, owning, improving the Porsche Cayenne 958Car Mechanics · Motoring press · published 24 September 2025 · consulted 9 October 2026
Fiabilité et pannes de la Renault Clio 4Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia JoggerFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Renault Koleos : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Solución fallo AdBlue Peugeot, Citroën y Opel: evita cambiar el depósitoST Automoción · Other source · published 11 December 2025 · consulted 26 September 2026 · in Spanish
La OCU quiere tomar medidas ante los problemas del sistema de AdBlue de Citroën y Peugeotcoches.com · Motoring press · published 30 May 2023 · consulted 26 September 2026 · in Spanish
AdBlue : problèmes en pagailleFiches-Auto · Motoring press · consulted 27 September 2026 · in French
Motores TFSI: características, ventajas e inconvenientesAutofácil · Motoring press · published 18 May 2020 · consulted 26 September 2026 · in Spanish
Essai, avis et fiabilité des 1.4 HDI 68 chFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes de la Renault Clio 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Avensis (2003-2009) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Tous les problèmes sur Volkswagen Golf IVfiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité du 1.2 PuretechFiches-auto.fr · Motoring press · consulted 26 September 2026 · in French
Cómo saber si el turbo está roto o a punto de romperseMotor.es · Motoring press · published 4 May 2020 · consulted 26 September 2026 · in Spanish
Fiat 1.3 Multijet: problemas, fallos y averías más frecuentesTotalrenting · Other source · consulted 26 September 2026 · in Spanish
Renault-Dacia. Quel bilan fiabilité pour le moteur 1.3 TCe ?L'argus · Motoring press · published 5 April 2021 · consulted 27 September 2026 · in French
Audi A6 C7: typische Probleme und Diagnose mit ODISKfz-Meisterbetrieb Dietrich (blog de taller) · Other source · consulted 9 October 2026 · in German
Common Problems of Audi A6 C7 3.0 TFSI: A Comprehensive GuideEuro Auto Pro (blog de taller, Australia) · Other source · published 6 October 2024 · consulted 9 October 2026
Honda: czy warto zainteresować się modelem z silnikiem 2.0 K20Auto Świat · Motoring press · consulted 30 October 2026 · in another language
Fiabilité et pannes Honda Civic (2006-2011)Fiches-auto.fr · Other source · consulted 27 September 2026 · in French
Hyundai KIA 1.0 MPi/T-GDi Engine (Kappa G3LA/G3LC) ReviewMotor Reviewer · Technical documentation · consulted 27 September 2026
Kia's new 1.0-liter turbocharged three-cylinder 'Kappa' engineCar Engineer · Technical documentation · published 20 February 2015 · consulted 27 September 2026
Fiabilité Mercedes Classe C (2014-2021)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Opel Mokka : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Part 573 Safety Recall Report 17V-368 (Porsche AH08, reguladores de los árboles de levas)NHTSA / Porsche Cars North America · Official body · published 21 February 2023 · consulted 9 October 2026
Essai, avis et fiabilité des 2,2 HDI 136 chevauxFiches-Auto · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Renault AustralFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Renault Master III 2.3 dCi 130: fiabilité, pannes et coûtsCarverif · Other source · consulted 5 October 2026 · in French
Toyota Prius 3 : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 26 September 2026 · in French
Fiabilité et pannes de la Volkswagen Polo 4Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
VW Touareg 3.0 TDI – typische Probleme und ODIS-DiagnoseKFZ Dietrich (taller, Hardegsen) · Other source · published 22 April 2026 · consulted 9 October 2026 · in German
FIAT 500 1.3 MultiJet II: EGR Valve Problems and How to Fix ThemAutoricambi Tritella · Technical documentation · consulted 26 September 2026
Kia Ceed 1.6 Crdi Problemas | Fallos y averías más frecuentesTotalRenting · Other source · consulted 26 September 2026 · in Spanish
Fiabilité Renault Espace 5 : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Vanne EGR : problèmes et pannesFiches-Auto · Motoring press · consulted 27 September 2026 · in French
BMW N43Wikipedia (inglés) · Other source · consulted 27 September 2026
Todo lo que necesitas saber sobre el motor BMW N54High Performance Academy · Technical documentation · consulted 5 October 2026 · in Spanish
The Definitive Guide to the BMW N54 EngineFCP Euro · Technical documentation · consulted 5 October 2026
Jeep Renegade: problemas, fallos y averías más frecuentesTotalrenting · Other source · consulted 27 September 2026 · in Spanish
Fiat Stilo : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
What Parts Of The Engine Are The Most Prone To Carbon Buildup?SlashGear · General press · published May 2026 · consulted 27 September 2026
Hyundai iX35 1.7 Crdi Problemas | Fallos y averías más frecuentesTotalRenting · Other source · consulted 27 September 2026 · in Spanish
Kia Ceed (JD): ProblemeGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Mercedes M111: Typische Probleme und HaltbarkeitGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
4 Common Mercedes M272 Engine Problems8020 Automotive · Technical documentation · consulted 5 October 2026
Mercedes A-Klasse (W169) – Typische Probleme & SchwachstellenGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Mercedes C-Klasse W203 – Typische Probleme & SchwachstellenGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Tips for buying a second-hand pickup: Nissan NavaraFarmers Weekly Interactive · Motoring press · consulted 5 October 2026
Opel Corsa 4 : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Opel Meriva 2 : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Opel Zafira - avis et pannes des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Opel Insignia A – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
Tous les problèmes sur Peugeot 206 (témoignages)Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Fiabilité Renault Espace 4 : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia Logan 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Suzuki Swift MK4 MZ 2005-2010: Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 8 October 2026 · in German
Fiabilité et pannes Suzuki Swift (2005-2010)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Toyota Auris (2007-2012) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Auris (2012-2018) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
La carbonilla en los motores: qué es, por qué es tan dañinaMotor.es · Motoring press · consulted 27 September 2026 · in Spanish
Fiabilité Volkswagen Golf V - pannes moteur, boîte, électronique...Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
1.5 BlueHDi. Stellantis rappelle plusieurs milliers de véhicules pour un problème d'injectionL'argus · Motoring press · published 14 March 2026 · consulted 26 September 2026 · in French
Recall 19V120000 - Kia Soul (catalytic converter overheating / piston and rod damage)NHTSA · Official body · published 2019 · consulted 27 September 2026
Fiabilité Nissan X-Trail : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
EPC-Leuchte: LadedruckstellerSEAT Ibiza Forum (foro) · Owners' forum · published January 2016 · consulted 26 September 2026 · in German
1.0L EcoBoost - Automatic Transmission - Illuminated MIL With Multiple DTCs (TSB 19-2168)Ford Motor Company · Manufacturer · published 28 May 2019 · consulted 26 September 2026
Detecta así la avería en los inyectores y ahorra 1.000 €Autopista · Motoring press · published 21 March 2024 · consulted 27 September 2026 · in Spanish
Fiabilité Alfa Romeo Stelvio, pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
BMW N20 Engine: Pros, Cons, Reliability, Tuning, and Maintenance GuideBMW BLOG · Motoring press · published 8 June 2025 · consulted 27 September 2026
Fiabilité et pannes de la Fiat Panda (2003-2012)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes de la Fiat 500Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Alfa Romeo MiTo : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Jeep Compass: problemas, fallos y averías más frecuentesTotalrenting · Other source · consulted 27 September 2026 · in Spanish
Ducato P0401 P0402 P0236 P0238 and limp mode, 2017 Euro 6 (hilo del foro)The FIAT Forum · Owners' forum · published 5 December 2021 · consulted 8 October 2026
DVSA – base de llamadas a revisiónDVSA (Reino Unido) · Official body · consulted 8 October 2026
Fiabilité et pannes Ford Focus 2Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Avis et fiabilité Honda Accord (2003-2008)Fiches-auto.fr · Other source · consulted 27 September 2026 · in French
Kia Rio III (2011-2017) - Typische Probleme & SchwachstellenGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Land Rover Range Rover Evoque 2.2 TD4: problemas crónicos y puntos débilesAraclo · Other source · consulted 5 October 2026 · in another language
Mazda 3 (BM/BN, 2013-2019) – Erfahrungen & ProblemeGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Defekter Kurbelwellensensor: Probleme, Ursachen, SymptomeGebrauchtwagenberater · Motoring press · published 7 April 2022 · consulted 8 October 2026 · in German
Mercedes OM656 Diesel: Häufige Probleme, Ursachen & Tipps zur Vermeidung von MotorschädenMBpassion · Motoring press · published 19 February 2026 · consulted 9 October 2026 · in German
Mitsubishi ASX – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
Nissan MR engineWikipedia · Other source · consulted 27 September 2026
Essai complet Opel Meriva : fiabilité et avisFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Opel Insignia - Leistungsverlust, Meldung im Kombiinstrument (2,0 CDTI)HELLA Tech World · Technical documentation · consulted 30 October 2026 · in German
Opel Insignia - Schlechter Motorlauf, Leistungsverlust und die Motorkontrolllampe leuchtet auf (A20DT)HELLA Tech World · Technical documentation · consulted 30 October 2026 · in German
Fiabilité Peugeot 308 : pannes et avis des propriétairesFiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
Tous les problèmes sur Citroën C8 2002-2015 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Fiabilité et pannes de la Renault Twingo 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Laguna II problème d'injecteurs 2.2 dCiPlanèteRenault (foro) · Owners' forum · published 5 September 2007 · consulted 30 October 2026 · in French
Fiabilité et pannes de la Renault Clio 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
RenaultSport Megane 225 buying guide, history and reviewOctane · Motoring press · published 7 February 2025 · consulted 5 October 2026
Fiabilité Renault Master 2.3 dCiCarverif · Other source · consulted 5 October 2026 · in French
Toyota Auris: Schwachstellen und Gebrauchtwagen-CheckGebrauchtwagenberater.de · Reliability study · consulted 27 September 2026 · in German
Toyota C-HR : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota 1.33 1NR-FE: Typische Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
Toyota Yaris 2 (2005-2011) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Problemas Volvo XC90 D5Total Renting · General press · consulted 5 October 2026 · in Spanish
Volvo XC40 (seit 2017) – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Other source · published March 2023 · consulted 27 September 2026 · in German
Volvo V90 – Bekannte Probleme & KrankheitenGebrauchtwagenberater.de · Other source · published January 2024 · consulted 27 September 2026 · in German
Volvo V60 I (2010 – 2018) – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Other source · published March 2023 · consulted 27 September 2026 · in German
Fiabilité et pannes de la Skoda CitigoFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Audi A4, A6, A8, Q7: error code P3134 and engine warning lamp lights upHELLA Tech World · Technical documentation · consulted 9 October 2026
Llamada a revisión de Stellantis a estos coches diésel por avería graveAutofácil · Motoring press · published 9 April 2026 · consulted 26 September 2026 · in Spanish
Mercedes-Benz - Problemas de fábrica no motor Mercedes M260 - suporte de custosPortal da Queixa · Owners' forum · published 24 June 2026 · consulted 29 October 2026 · in Portuguese
Mazda CX-3 – Erfahrungen & ProblemeGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Mercedes-Benz W210Wikipedia · Other source · consulted 27 September 2026
Tous les problèmes sur Citroën Xsara (témoignages)Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Fiabilité Toyota Avensis (2.0 VVTi 150 ch)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
Fiabilité et pannes Ford Mondeo 3Fiches-auto.fr · Other source · consulted 27 September 2026 · in French
Fiabilité Fiat: témoignages de propriétairesfiches-auto.fr · Other source · consulted 29 October 2026 · in French
Fiabilité Ford : pannes par modèle et générationFiches-auto.fr · Other source · consulted 27 September 2026 · in French
Range Rover Evoque 2.0 P250 Engine: Problems & CostsVogue Technics Engine Rebuild (UK) · Other source · consulted 29 October 2026
Vanliga fel: Toyota Hilux (guía de averías comunes, 2016-2020)Minbilkoll.se · Motoring press · consulted 30 October 2026 · in another language
Tous les problèmes sur Citroen C3 II 2009-2016 (359 témoignages)Fiches-auto.fr · Owners' forum · consulted 26 September 2026 · in French
¿Qué es y cómo funciona la válvula PCV?Infotaller · Motoring press · published 21 December 2017 · consulted 26 September 2026 · in Spanish
Gebrauchter Audi A6 und S6 C7 ZuverlässigkeitsleitfadenEuro Premium Parts (blog de recambista) · Other source · published 29 November 2025 · consulted 9 October 2026 · in German
MG HS PHEV: guía definitiva de problemas y soluciones del SUV, el híbrido enchufable más vendidoAutopista.es · Motoring press · published 10 November 2025 · consulted 27 September 2026 · in Spanish
Avis moteur Nissan Qashqai 2 1.6 163 chFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Avis moteur Nissan Juke 1.6 Turbo 190 chFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Tous les problèmes sur Opel ASTRA 2009-2015Fiches-auto.fr · Owners' forum · consulted 30 October 2026 · in French
Fiabilité Opel Astra (H): pannes et témoignagesFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Opel Insignia (A): pannes et témoignagesFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes de la Renault Mégane 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Renault Scénic 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Boxer: error de software del inyector de urea (alerta Safety Gate A12/01870/23)RappelConso (Gobierno de Francia) · Official body · published 25 August 2023 · consulted 9 October 2026 · in French
Jumper: error de software del inyector de urea (alerta Safety Gate A12/01876/23)RappelConso (Gobierno de Francia) · Official body · published 25 August 2023 · consulted 9 October 2026 · in French
Movano: error de software del inyector de urea (alerta Safety Gate A12/01877/23)RappelConso (Gobierno de Francia) · Official body · published 25 August 2023 · consulted 9 October 2026 · in French
Toyota Aygo (I & II): Schwachstellen, Probleme & KaufberatungGebrauchtwagenberater.de · Motoring press · published 12 April 2023 · consulted 30 October 2026 · in German
Peugeot 107: Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 30 October 2026 · in German
Toyota Corolla Verso (2004-2009) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Verso (2009-2017) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Problemas Volvo C30Total Renting · General press · consulted 8 October 2026 · in Spanish
Tous les problèmes sur Volkswagen TOURAN 2003-2010Fiches-auto.fr · Owners' forum · consulted 30 October 2026 · in French
Fiabilité Audi A3 - pannes moteur, boîte, électronique...Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Suzuki Ignis (MF, ab 2016) – Bekannte Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
Suzuki Ignis : avis, qualités et défauts des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Fiabilité et pannes de la Skoda Fabia 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Jaecoo 7 recalled: quarter of all 2025 UK cars going back to dealersAuto Express · Motoring press · published 6 March 2026 · consulted 30 October 2026
KIA Sportage – Brake Lights May Malfunction (R/2013/055)car-recalls.co.uk · Other source · consulted 5 October 2026
Opel Meriva (2014-2015): engine wiring harness may chafe against the transmission housing (Safety Gate 2015)car-recalls.eu · Other source · published 27 August 2015 · consulted 30 October 2026