Fuel and injectionGeneric OBD-II codeUrgency: Monitor
Code P0463: fuel level sensor: high signal
What code P0463 means
The ECU has read a voltage above its normal range from fuel level sensor "A" for a period of time.[1][2]
The sensor is a float with an arm over a variable resistor, inside the fuel pump module in the tank. The voltage changes with the level. A high signal usually indicates an open circuit in the sensor or its wiring, which lets the signal rise towards the reference voltage.[1]
The ECU uses the level to decide when to run the EVAP leak check, so an incorrect value can block it.[1]
Original definition (SAE J2012): Fuel Level Sensor A Circuit High[1][2]
Causes of P0463
From most to least likely, according to the sources.
- 1Level sensor (float resistor) open or corroded inside the pump module, the most common cause according to AutoDTCs.[1][2]
- 2Float arm bent, broken or stuck, so that the wiper loses contact.[1]
- 3Signal wire open or chafed between the sensor and the ECU or cluster.[1][2]
- 4Loose or corroded connector at the pump module or at a splice.[1][2]
- 5Instrument cluster or ECU fault, uncommon.[1][2]
Symptoms
- Engine warning light on.[1][2]Engine warning light: faults that cause it
- Fuel gauge that reads wrongly, sticks or jumps, and an incorrect remaining range.[1][2]Electronic warnings: faults that cause it
- EVAP monitor not completed, with a risk of failing the emissions test.[1]Pollution control faulty: faults that cause it
How to diagnose P0463
In order: from the most likely and cheapest to check to the most expensive.
- 1With a diagnostic tool, read the fuel level value and compare it with the fuel actually in the tank.[1]
- 2Inspect the pump module connector (usually under the rear seat) for corrosion or pushed-in pins and wiggle the wiring while watching the live value.[1]
- 3Check the continuity of the signal wire to the ECU or cluster.[1]
- 4Measure the sensor resistance while moving the float from empty to full; there must be no open sections.[1]
- 5Check earth and reference voltage before suspecting the ECU or cluster.[1][2]
Can I keep driving with P0463?
Monitor
It does not damage the engine, but an unreliable gauge can leave you without fuel: refuel soon and keep track of the kilometres. It keeps the warning light on and may fail the emissions test.[1]
Parts related to code P0463
The parts that most often cause this code. The code points to the circuit, not always the part: diagnose before you buy.
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Documented faults related to P0463
Known faults of specific engines and cars, with their repair cost, the affected years and their sources.
Fuel pump and high-pressure pump: the most serious faults by engine and car
- Critical severityFrequency: Common2.0 and 2.5 HybridLow-pressure fuel pump failure: loss of power and fire riskYes: a low-pressure fuel pump with a defective impeller (Denso) affects millions of Toyotas and Lexuses, including Corolla, C-HR, RAV4 and Camry models with these engines. It can cause loss of power or stalling, and in the EU there is also a risk of leaks and fire on 2018-2022 Corolla, C-HR and Auris models.
- High severityFrequency: CommonBMW N54/N55High-pressure fuel pump (HPFP) failureThe N54's high-pressure pump is one of its best-documented failures: most units will have had it replaced at some point. It warns of itself with long cranking and loss of power; the 2010 campaign was US-only.
- High severityFrequency: Common2.2/2.5 dCiInjection pump or injector failureThe 2.2 dCi's common rail injectors fail fairly often on the X-Trail and Almera, with cases of seizing and leaks; on the Almera with the older YD22DDT, the documented fault is in the injection pump electronics, not the injectors.
- High severityFrequency: CommonVW 2.0 TFSI EA113Wear of the high-pressure pump cam followerYes: the 2.0 TFSI EA113's high-pressure fuel pump is driven by the camshaft through a follower (tappet) that wears; if it wears through it can damage the pump or the camshaft, so it should be checked and replaced as a preventive measure.Repair (garage): €250–€900Appears at around 90,000 km
Wiring, connectors and short circuits: the most serious faults by engine and car
- Critical severityFrequency: OccasionalBMW N62 / N63Additional turbo coolant pump with a risk of short circuit and fireIn 2011 BMW recalled 5, 6 and 7 Series, X5 and X6 models built between 2007 and 2011 because of the additional turbo coolant pump: moisture, a short circuit and, in extreme cases, a fire. In 2012 there was another campaign for a crack in the pump, with a more robust version.
- Critical severityFrequency: Occasional1.6 GDi híbrido (Kappa)Main relay of the power relay assembly (overheating and fire risk)Yes, on the first units: Hyundai and Kia recalled 2016–2018 Ioniq and Niro hybrids and plug-in hybrids because the main relay that connects the high-voltage battery could come loose, overheat and, in the worst case, cause a fire.
- Critical severityFrequency: Occasional1.6 GDi híbrido (Kappa)Clutch hydraulic actuator (HCA): leak or moisture with risk of short circuit and fireYes, this is the most documented hybrid system fault: the hydraulic actuator that engages the combustion engine with the hybrid assembly has had two recalls (2018 for a leak on the Niro and 2025 for moisture in its electronic board on the Niro, Ceed and XCeed PHEV), with a risk of short circuit and fire.
- High severityFrequency: Occasional1.3 TCeBlown fuel pump fuseOn the Renault Captur II and Clio V with the 1.3 TCe engine, a 20-amp fuse can blow and leave the car without an engine. According to L'argus, in April 2021 this fault still had no factory fix; the official service centre's diagnosis includes checking, and sometimes replacing, the catalytic converter.
- Critical severityFrequency: CommonRover 75Seat SRS connector fault with airbag and seatbelt warning light onAuto Express warns that the Rover 75's seat SRS connector can cause the airbags to fail, and dealers were fixing it with revised connectors. The Dutch APK inspection puts the airbag or seatbelt fault warning among the most frequent defects across almost all series.
- Critical severityFrequency: OccasionalAlfa Romeo GiuliettaShort circuit from badly routed wiring that can prevent gear shifting (KBA campaign, 2010-2015)Yes: according to Germany's KBA, on Alfa Romeo Giulietta cars built between 2010 and 2015 inadequate cable routing could cause a short circuit and, as a result, gear-shift failure.
Instrument cluster: the most serious faults by engine and car
- High severityFrequency: OccasionalCitroën Jumper IISteering lock switch fault that switches off the instrument panel (2014 and 2015 vehicles)Yes: Citroën recalled Citroën Jumpers built between late 2014 and mid-2015 because a fault in the steering lock switch could intermittently switch off the information on the instrument panel. Safety Gate describes it as a failure of several electrical systems with a risk of accident.
- High severityFrequency: OccasionalFiat Doblò IIIInstrument cluster display fault: it may stop showing speed and warning lightsIn September 2026 a recall was published for 4,654 Doblòs built between September 2025 and 1 March 2026: because of a software fault, the instrument cluster display may stop showing speed, warning lights and messages. It is corrected with a software update of the body control module.
- High severityFrequency: OccasionalFiat Grande PandaInstrument cluster software that may stop mandatory warning lights and alerts from being displayed (2026 recall F62P/F62Q)Yes: recall F62P/F62Q (Safety Gate alert SR/02286/26, August 2026) covers 2,207 vehicles, including Grande Panda MHEV cars built between 28 May and 9 July 2026. A software inconsistency can stop certain mandatory warning lights and alerts from being shown on the instrument cluster.
- High severityFrequency: OccasionalHyundai Ioniq 5Recall for spontaneous restart of the instrument cluster while drivingHyundai recalled, among other models, Ioniq 5s built between 30 June and 14 November 2025 because the instrument cluster could restart by itself while driving, with the screen going black for a few seconds and a delay in showing warnings. In Germany it affected 4,271 of the group's 36,316 units worldwide; it is fixed with a software update.
P0463 by make
Documented faults that can trigger P0463 in each make's engines and cars.
Frequently asked questions
Can I drive with code P0463?
Yes, but do not trust the gauge: keep track of the kilometres and refuel with a margin.[1]
Does the fuel pump need replacing?
Not necessarily. The sensor is inside the pump module, but the fault may be in the connector, the wiring or the float. The module is only replaced if the sensor is faulty.[1][2]
Why does the warning light come on because of a gauge?
Because the ECU uses the level to run the EVAP system check and detects out-of-range signals.[1]
How much does it cost to fix?
CarWiki gives a range of €50 to €1,500 depending on the cause, from a connector to the complete module. It is not a reliable workshop figure.[2]
Will I pass the MOT with code P0463?
If the code has switched on the engine warning light, no: with that light on, the inspection records a serious defect, and on Euro 5 and Euro 6 cars the ITV (Spain's roadworthiness inspection, similar to the MOT) also reads the OBD diagnostic system. Repair the fault before you go; clearing the code just before the inspection does not help either, because it counts as a serious defect.[3]
Not sure what is wrong with your car? Describe what you notice in the symptom diagnosis or see all fault codes.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- P0463 – AutoDTCsAutoDTCs · Technical documentation · consulted 29 October 2026
- OBD Fehlercode P0463CarWiki.de · Technical documentation · consulted 29 October 2026 · in German
- 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