Ford warning lights: what each light means

Oil pressure warning light on

Urgency: As soon as possibleRedSymbol: oil can (an oil can with a drop)

The red oil-can warning light means the engine is not getting the oil pressure it needs. The cause may be a low oil level, a failing oil pump or a blocked oil circuit. With low pressure, parts such as the turbo, the bearings or the timing drive can wear out within minutes.

What to do: Stop the car as soon as it is safe and switch the engine off. Check the level with the dipstick and do not drive on if the light stays on: call a recovery truck.

6 documented faults that trigger it in the Ford

• Critical severity: Degradation of the timing belt running in oil · 1.0 EcoBoost engine · B-Max, C-Max II, EcoSport and 9 more
• Critical severity: Oil pump belt and tensioner failure · 1.0 EcoBoost engine · B-Max, C-Max II, EcoSport and 9 more
• Critical severity: Degradation of the wet timing belt (2.0 EcoBlue) · 1.5 / 2.0 EcoBlue engine · Focus IV, Galaxy III, Kuga III and 6 more
• Critical severity: Timing chain stretch and tensioner failure · 1.3 Multijet engine · Ka II
• Critical severity: Wet oil pump belt (2.0 EcoBlue) · 1.5 / 2.0 EcoBlue engine · Focus IV, Galaxy III, Kuga III and 6 more
• Medium severity: Clogged oil separator and crankcase overpressure · Volvo 5 cilindros gasolina engine · Focus II, Kuga I, Mondeo IV and 1 more

• Oil warning light on Ford: by model
• Oil warning light: general guide

Overheating or temperature warning light

Urgency: As soon as possibleRedSymbol: thermometer over wavy lines (coolant)

The temperature needle climbs towards the red zone or the coolant warning light comes on. It usually points to a lack of coolant, a leak, or a failing thermostat or water pump. Driving on can warp the cylinder head or damage the gasket.

What to do: Stop as soon as you can and switch the engine off. Do not open the coolant reservoir cap while it is hot. If coolant is missing, do not set off again until you have found the leak.

4 documented faults that trigger it in the Ford

• Critical severity: Cracked cylinder head from overheating, with fire risk · 1.6 EcoBoost engine · C-Max II, Fiesta VII, Focus III and 5 more
• Critical severity: Coolant leaks and overheating from the turbo hose · 1.0 EcoBoost engine · B-Max, C-Max II, EcoSport and 6 more
• High severity: Coolant loss from hoses, water pump or expansion tank · 1.6 EcoBoost engine · C-Max II, Fiesta VII, Focus III and 5 more
• Medium severity: Thermostat, water pump and coolant loss · 1.25/1.4/1.6 Ti-VCT engine · B-Max and Fiesta VII

• Overheating on Ford: by model
• Overheating: general guide

Airbag warning light on

Urgency: Garage soonRedSymbol: a seated person wearing a seat belt with a circle (the inflated airbag) in front; in some cars, the letters SRS or AIRBAG

The airbag warning light means the system has detected a fault and an airbag or seatbelt pretensioner may not deploy in a crash. Causes range from a connector under the seat to the control unit or the airbag itself.

What to do: Have it diagnosed as soon as possible and check with the VIN whether the car has any outstanding airbag recall.

3 documented faults that trigger it in the Ford

• Critical severity: Faulty inflator in the side and knee airbags (2015-2016) · outside the engine · C-Max II
• Critical severity: Airbag inflator with propellant degraded by moisture and temperature · outside the engine · Galaxy III
• Critical severity: Risk of the side or knee airbag not deploying because of a faulty initiator · outside the engine · Kuga II

• Airbag light on Ford: by model
• Airbag light: general guide

Electric parking brake warning

Urgency: Garage soonRedSymbol: letter P inside a circle in brackets, sometimes with an exclamation mark

Cars with an electric parking brake show a warning light or message when the caliper motor, its wiring or the control unit fails. The brake may not release or may not apply.

What to do: Do not rely on the handbrake if the warning appears: park on level ground and leave the car in gear. Have the system diagnosed.

2 documented faults that trigger it in the Ford

• Medium severity: Seized or broken parking brake cable or actuator · outside the engine · S-Max I
• Medium severity: Electric parking brake faults and ABS/ESP warnings caused by wheel sensors · outside the engine · S-Max II

• Parking brake warning: general guide

Engine fault warning light (check engine)

Urgency: Garage soonYellow or amberSymbol: outline of an engine seen from the side, in yellow or orange

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.

What to do: 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.

16 documented faults that trigger it in the Ford

• High severity: Turbo failure through lack of lubrication (carbon deposits and union filter) · 1.6 HDi engine · C-Max I, Fiesta VII and Focus II
• High severity: Variable-geometry turbo failures (actuator, sensors and clogging) · 2.0 HDi engine · C-Max II and Focus III
• Medium severity: Injectors that lose their seal and let diesel escape · 1.4 HDi engine · Fiesta V, Fiesta VII and Fusion
• High severity: Injector and high-pressure pump wear from contaminated fuel · 1.3 Multijet engine · Ka II
• High severity: Turbo faults, somewhat more frequent on the sequential twin-turbo versions · 2.2 HDi engine · Mondeo IV
• Medium severity: Jerking and injection faults on the 1.6 e-HDi 112/115 (Continental injectors) · 1.6 HDi engine · C-Max II, Focus III and Transit Connect

And 10 more faults on the linked pages.

• Engine warning light on Ford: by model
• Engine warning light: general guide

ABS or ESP warning light on

Urgency: Garage soonYellow or amberSymbol: the letters ABS, usually inside a circle, in amber or orange

It indicates a fault in the anti-lock braking or stability control system: often a dirty or damaged wheel speed sensor, its wiring or the hydraulic unit. The brakes still work, but without those aids.

What to do: Drive carefully, especially in the rain, and ask for a fault code read-out. It is often fixed with a wheel sensor.

6 documented faults that trigger it in the Ford

• High severity: Alternator fault with false battery, ESP and power steering warnings · outside the engine · Focus II
• Medium severity: ESP warning light permanently on due to a defective ABS module (code C1288) · outside the engine · C-Max I
• Medium severity: ABS failure caused by the hydraulic unit and premature wear of the brake discs · outside the engine · B-Max
• Medium severity: Rear brake drums that seize · outside the engine · Fiesta V
• Medium severity: Electronic faults on the S-Max: ABS/ESP warnings and steering wheel controls · outside the engine · S-Max I
• Medium severity: Electric parking brake faults and ABS/ESP warnings caused by wheel sensors · outside the engine · S-Max II

• ABS/ESP light on Ford: by model
• ABS/ESP light: general guide

ESP warning light on or flashing

Urgency: Garage soonYellow or amberSymbol: the silhouette of a car with curved skid marks (swerving lines) beneath it, or the letters ESP, in amber or orange

The ESP light belongs to the electronic stability control, the system that brakes wheels individually and reduces power when the car starts to skid. It flashes while the system is intervening; if it stays on steadily, it usually indicates a fault (often a sensor) or that ESP has been switched off with its button.

What to do: If it flashes in a bend or on a wet road, ease off: ESP is working. If it stays on, switch off and restart, check the ESP OFF button has not been pressed and, if it persists, ask a garage for a fault code read-out.

4 documented faults that trigger it in the Ford

• High severity: Alternator fault with false battery, ESP and power steering warnings · outside the engine · Focus II
• Medium severity: ESP warning light permanently on due to a defective ABS module (code C1288) · outside the engine · C-Max I
• Medium severity: Electronic faults on the S-Max: ABS/ESP warnings and steering wheel controls · outside the engine · S-Max I
• Medium severity: Electric parking brake faults and ABS/ESP warnings caused by wheel sensors · outside the engine · S-Max II

• ESP light on Ford: by model
• ESP light: general guide

Particulate filter warning light (DPF)

Urgency: Garage soonYellow or amberSymbol: particulate filter symbol on the dashboard, normally amber; its design varies by manufacturer

On modern diesels it means the particulate filter is clogged with soot and has not been able to regenerate. It is common in cars used mostly for short town journeys, although it can also be caused by a sensor or by an injection or EGR fault.

What to do: If the handbook allows it, a 20-minute drive on a motorway at a steady speed can complete the regeneration. If the light stays on or you lose power, go to a garage.

3 documented faults that trigger it in the Ford

• High severity: DPF clogging on additive-type systems (Eolys/cerine) · 2.0 HDi engine · C-Max II and Focus III
• High severity: Incomplete particulate filter regenerations and oil dilution · 1.3 Multijet engine · Ka II
• Medium severity: Additive-fed particulate filter (Eolys cerine): depleted additive and clogging · 1.6 HDi engine · B-Max, C-Max I, C-Max II and 4 more

• DPF warning light on Ford: by model
• DPF warning light: general guide

"Pollution control system faulty" message

Urgency: Garage soonYellow or amberSymbol: a text message on the dashboard ("anticontaminación defectuosa" or similar wording, in English "emissions system fault"), sometimes alongside an amber warning light

A common message on Peugeot, Citroën, DS and Opel cars from the Stellantis group. It appears when the ECU detects a fault in a component that controls emissions: the particulate filter, the EGR valve, the sensors, the AdBlue system or, on petrol engines, combustion problems.

What to do: It is not a specific fault but a generic warning. Have the car diagnosed with the right equipment to read the exact code before replacing any part.

2 documented faults that trigger it in the Ford

• High severity: DPF clogging on additive-type systems (Eolys/cerine) · 2.0 HDi engine · C-Max II and Focus III
• Medium severity: Additive-fed particulate filter (Eolys cerine): depleted additive and clogging · 1.6 HDi engine · B-Max, C-Max I, C-Max II and 4 more

• Pollution control faulty: general guide

AdBlue system warning

Urgency: Garage soonYellow or amberSymbol: AdBlue system warning in the instrument cluster, yellow or orange at first, usually accompanied by a text message and, later on, a countdown in kilometres

Diesels with selective catalytic reduction (SCR) use AdBlue to cut NOx emissions. A warning with a countdown ("engine will not restart in X km") indicates a low level or a fault in the AdBlue tank, pump, heater or injector. When the countdown reaches zero, the car will not start again.

What to do: If the tank is full and the warning persists, the problem lies with the system. Go to a garage before the countdown ends and keep your receipts in case the fault is covered by a manufacturer campaign.

1 documented fault that triggers it in the Ford

• Medium severity: Emissions system warnings (AdBlue/EGR) and injector wear · 1.5 / 2.0 EcoBlue engine · Fiesta VIII, Focus IV, Galaxy III and 10 more

• AdBlue warning: general guide

Seatbelt fault warning light or message

Urgency: Garage soon

The dashboard shows a warning related to the seatbelt or its pretensioner, separate from the generic "fasten your seatbelt" reminder. It may be caused by a fault in the sensor, the pyrotechnic pretensioner or the control unit that manages them.

What to do: Ask for the seatbelt and pretensioner system to be checked at a garage with the right diagnostic equipment, and check whether any manufacturer campaign is outstanding for your vehicle.

2 documented faults that trigger it in the Ford

• Critical severity: Recall over the rear seat belt mounting (limited series) · outside the engine · Fiesta V
• High severity: 2019 and 2021 campaigns over seat belt system faults · outside the engine · Fiesta VIII

• Seatbelt warning: general guide