ABS or ESP warning light on: which faults cause it?

Documented faults that cause it: brake actuator failure (hard pedal, loss of assistance), in the 1.8 Hybrid.

Warning lights and alertsUrgency: Garage soon

ABS or ESP warning light on: causes and the faults that trigger it

The ABS warning light, the letters ABS in amber or orange, warns of a fault in the anti-lock braking system. It does not mean you have lost your brakes: normal braking still works, but under hard braking the wheels can lock, and traction control and stability control (ESP), which depend on the ABS, may also be affected. The usual causes are a wheel speed sensor, its wiring, the brake fluid level, a fuse or the control unit, and it is best to have it diagnosed soon.^[1][2][3][4]

Colour: yellow or amber. Symbol: the letters ABS, usually inside a circle, in amber or orange.

One documented fault causes it in the 1.8 Hybrid:

Critical severity: Brake actuator failure (hard pedal, loss of assistance)

What it means

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.

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

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

Reviewed on 5 October 202672 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. Dirty or damaged wheel speed sensor
Common cause
RACE lists a damaged speed sensor among the causes of the warning light, and Motorpasión mentions dirt on the sensors. Motorpedia adds that the sensor can give an intermittent signal if the tone ring (the toothed ring it reads) is damaged or has metal debris stuck to it, and Autodoc Club also lists it among the common faults.^[1][2][4][5]
Faults with with the ABS and ESP
2. Damaged wiring or connectors
Common cause
According to RACE, a broken, corroded, damp or badly connected wire can cause the fault. Motorpedia specifies that sensor cables break or chafe in the areas that move (suspension and steering) and that connectors can corrode; Motorpasión also cites damaged wiring and Autodoc Club cites electrical connection problems.^[1][2][4][5]
Faults with with the electrical wiring Faults with with the ABS and ESP
3. Low or degraded brake fluid
Possible cause
RACE explains that, with the brake fluid below the recommended level, the system can trigger the warning, and Autodoc Club includes low or degraded fluid among the causes.^[1][5]
Faults with with the brake system
4. Blown fuse
Possible cause
RACE points out that a blown fuse can interrupt the ABS and turn the warning light on.^[1]
Faults with with the electrical wiring
5. Air in the circuit, pump or failed recalibration
Possible cause
Motorpasión, discussing a warning light that does not go out after hard braking, also cites an air bubble in the brake fluid circuit, a pump failure or an incorrect recalibration of the system, and makes clear that it is for the workshop to determine which it is.^[2]
Faults with with the brake system Faults with with the ABS and ESP
6. ABS control unit or hydraulic module
Uncommon
RACE includes internal faults of the ABS electronic unit and the valve block among the causes, and Motorpedia considers them less common than sensor and wiring problems. It is also the most expensive repair.^[1][3][4]
Faults with with the ABS and ESP Faults with with the control units

Depending on what you notice

The ABS light came on after hard braking

Motorpasión clarifies that this does not mean you have lost your brakes, but it does mean the anti-lock system will not help you in the next emergency stop. Among the causes it cites dirt on sensors, damaged wiring, air in the circuit, the pump or a failed recalibration, and it advises taking the car to a workshop if the light does not go out.^[2]

ABS light on: can I keep driving?

RACE says you can drive temporarily if the car brakes normally, but that it is not advisable to put it off, and advises reducing speed and avoiding harsh braking. The reason is that without ABS the wheels can lock under hard braking; Motorpasión insists on not leaving it for later.^[1][2][3]

ABS fault and the car won't start

RACE warns that in more modern cars an ABS fault can even prevent the car from starting, whereas in its article on the warning light it says the car can normally keep being driven. This is a claim we have only seen in that source: if your car will not start, the workshop's code reading will tell you whether the ABS is the cause.^[1][3]

ABS and ESP warning lights on at the same time

It is not unusual: RACE points out that traction control and stability control depend on the ABS, and Motorpedia explains that the failure of an ABS sensor affects traction control, ESP, electric power steering and, in some cars, variable suspension.^[3][4]

ABS light amber or red

RACE describes the ABS light as amber or red and in both cases links it to a fault in the anti-lock system. The sources consulted do not explain what the difference is between one colour and the other.^[6]

What to check first

Check that the car brakes normally; reduce your speed and avoid harsh braking for as long as the light stays on.^[1]
Switch the engine off and start it again to see whether the warning disappears.^[1]
Look at the brake fluid level: below the recommended minimum it can turn the light on.^[1][5]
Check whether the ESP or traction control warning lights are also on, as they depend on the ABS.^[3][4]
Ask a workshop for an electronic diagnosis: a scanner reads the fault codes and the speed of each wheel in real time, which locates the sensor, cable or module that is failing.^[1][4]
If your MOT is coming up, repair the fault first: with the light on it is grounds for failure.^[7]

Can I keep driving?

Urgency: Garage soon

You can normally keep driving with care. RACE says the car can be driven temporarily if it brakes normally, because the conventional braking system still works, but it does not recommend prolonging it and advises stopping in a safe place if the car behaves strangely. Without ABS, hard braking can lock the wheels, and Motorpasión insists on not putting the check off.^[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 an ABS sensor (RACE range; it does not say whether labour is included)^[1]	€50 – €150
Repairing the ABS control unit (RACE says it can exceed 500 euros, with no upper limit given)^[1]	€500
Replacing the ABS module or valve block (approximate RACE figures, from about 700 to about 2,000 euros; it does not say what is included)^[3]	€700 – €2,000

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 severityOccasionalFrequency: Occasional1.8 HybridBrake actuator failure (hard pedal, loss of assistance)It may be accompanied by braking system or ABS warnings on the dashboard.
Source for the symptom in the 1.8 Hybrid^[9]

Faults elsewhere in the car that cause it

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

- Critical severityVery frequentFrequency: Very frequentKia Sportage IVShort circuit in the ABS/ESP unit with fire riskThe ABS or ESP warning light may come on if the control unit detects the electrical fault before a major failure.
Source for the symptom in the Kia Sportage IV^[10]
- Critical severityVery frequentFrequency: Very frequentOpel Corsa FBrake fluid leak and loss of ABS/ESP from the EBS valve block (2024 production)The ABS or ESP warning light may come on in the instrument cluster; the fault can also show up directly as a brake fluid leak.
Source for the symptom in the Opel Corsa F^[11]
- Critical severityVery frequentFrequency: Very frequentPeugeot 208 IIBrake fluid leak and loss of ABS/ESP due to the EBS valve block (2024 production)The ABS or ESP warning light may come on; the fault may also show up directly as a brake fluid leak.
Source for the symptom in the Peugeot 208 II^[12]
- High severityCommonFrequency: CommonFord Focus IIAlternator fault with false battery, ESP and power steering warningsThe ESP warning light may come on for no real reason when the charging voltage becomes unstable.Appears at around 60,000 km
Source for the symptom in the Ford Focus II^[13]
- High severityCommonFrequency: CommonRenault Laguna IIMultiplex electrical system and hands-free card faultsThe ABS, ESP and handbrake warning lights come on at the same time, often for no apparent reason.
Source for the symptom in the Renault Laguna II^[14]
- Critical severityOccasionalFrequency: OccasionalCitroën C4 IIIInternal brake fluid leak from the EBS valve block (built May-June 2024)The internal brake fluid leak in the valve block can end up lighting the ABS or stability control (ESP) warning lights when they stop working.
Source for the symptom in the Citroën C4 III^[15]
- Critical severityOccasionalFrequency: OccasionalDacia DokkerRecall for debris in the brake hydraulic unit (ABS/ESP)A loss of braking efficiency does not necessarily warn you with a prior symptom: it is a latent defect corrected in the campaign.
Source for the symptom in the Dacia Dokker^[16][17]
- Critical severityOccasionalFrequency: OccasionalDacia LodgyRecall for debris in the brake hydraulic unit (ABS/ESP)A loss of braking effectiveness does not necessarily warn you with a prior symptom: it is a latent defect corrected in the campaign.
Source for the symptom in the Dacia Lodgy^[16][17]
- Critical severityOccasionalFrequency: OccasionalHyundai i40Short circuit in the ABS hydraulic module (HECU) with a burning smellAccording to the DVSA, the fault can turn on the engine warning light (MIL) or the ABS light.
Source for the symptom in the Hyundai i40^[18]
- Critical severityOccasionalFrequency: OccasionalOpel Mokka BBrake fluid leak and loss of ABS/ESP from the EBS valve block (built May-June 2024)The ABS or ESP warning light may come on; the fault may also show itself directly as a brake fluid leak.
Source for the symptom in the Opel Mokka B^[19]
- Critical severityOccasionalFrequency: OccasionalVolkswagen Jetta VABS/ESP earth connection interrupted by thermal overloadABS/ESP system fault: the source does not describe the specific warning shown on the instrument cluster.
Source for the symptom in the Volkswagen Jetta V^[20]
- High severityOccasionalFrequency: OccasionalAudi Q4 e-tronCampaign 45BF: stability control module missing pump motor screwsA module fault can switch on the ABS/ESP warning light; the data sheet describes no specific symptoms.
Source for the symptom in the Audi Q4 e-tron^[21]
- High severityOccasionalFrequency: OccasionalBMW Serie 3 F30ABS pump and ABS/DSC module failureThe ABS or ESP warning light may come on when the pump or the ABS/DSC module fails.
Source for the symptom in the BMW Serie 3 F30^[22]
- High severityOccasionalFrequency: OccasionalBMW Serie 5 E39ABS module failure on the BMW 5 Series E39ABS warning light on.
Source for the symptom in the BMW Serie 5 E39^[23]
- High severityOccasionalFrequency: OccasionalBMW Serie 7 G11ABS module: recall for longer braking distanceThe page describes no symptoms; the risk it points to is a longer braking distance than expected.
Source for the symptom in the BMW Serie 7 G11^[24]
- High severityOccasionalFrequency: OccasionalBMW X5 E70xDrive transfer case failure on the X5 E70Jerking during manoeuvres, vibrations at low speed and 4x4/DSC warnings on the dashboard.
Source for the symptom in the BMW X5 E70^[25]
- High severityOccasionalFrequency: OccasionalBMW X6 E71xDrive transfer case failure on the X6 E714x4/DSC warnings, jerking during manoeuvres and vibrations at low speed.
Source for the symptom in the BMW X6 E71^[26]
- Medium severityCommonFrequency: CommonFord C-Max IESP warning light permanently on due to a defective ABS module (code C1288)The ESP warning light stays permanently on in the instrument cluster.
Source for the symptom in the Ford C-Max I^[27]
- High severityOccasionalFrequency: OccasionalHyundai Tucson IBrake light switch failure from burnt contacts (2007 to 2009 Tucson)The stability control (ESP) may switch off and show its warning light.
Source for the symptom in the Hyundai Tucson I^[28]
- High severityOccasionalFrequency: OccasionalKia Carens IIIFaulty brake light switch: the lights may not come on when brakingThe stability control (ESC) may malfunction and turn on its warning light.
Source for the symptom in the Kia Carens III^[29]
- High severityOccasionalFrequency: OccasionalRenault Kangoo IIPossible reversed ABS lines and pump failuresABS warning light on; in some cases the brake warning light also comes on, possibly because of the float in the brake fluid reservoir.Appears at around 25,000 km
Source for the symptom in the Renault Kangoo II^[30]
- High severityOccasionalFrequency: OccasionalRenault Mégane IIIWater ingress into the ABS/ESP modulesThe ABS or ESP warning light comes on in the instrument cluster, sometimes together with the system cutting out.
Source for the symptom in the Renault Mégane III^[31]
- High severityOccasionalFrequency: OccasionalToyota Prius IIIDelayed brake response caused by the ABS software on the Prius IIIDelayed braking response on slippery or uneven surfaces.
Source for the symptom in the Toyota Prius III^[9][32]
- High severityOccasionalFrequency: OccasionalVolkswagen Caddy IIIInadequate ABS/ESP diagnostic functionThe documented problem is not that the ABS/ESP warning light comes on for no reason, but the opposite: that the system fails to detect and warn of a real fault with the expected reliability.Repair: €0
Source for the symptom in the Volkswagen Caddy III^[33]
- High severityOccasionalFrequency: OccasionalVolkswagen Passat B8Brake-related campaigns: wiring on the first cars and fluid leaks on 2019-2023 unitsABS or ESP warnings related to a wiring fault on the first cars.Repair: €0
Source for the symptom in the Volkswagen Passat B8^[34]
- Medium severityCommonFrequency: CommonVolkswagen Touran ISensor and ABS/ESP control unit faultsThe ABS warning light, the ESP warning light or both come on in the cluster, sometimes intermittently.
Source for the symptom in the Volkswagen Touran I^[35]
- Medium severityOccasionalFrequency: OccasionalAudi A3 IABS/ESP module or hydraulic unit failureThe ABS or ESP warning light comes on and the system stops working.
Source for the symptom in the Audi A3 I^[36]
- Critical severityRareFrequency: RareAudi A3 IIInsufficient ESP and ABS diagnostic function on 2009 vehiclesThe ABS or ESP warning light may come on, or these systems may not work as they should without the on-board diagnostics detecting it correctly.
Source for the symptom in the Audi A3 II^[37]
- Medium severityOccasionalFrequency: OccasionalAudi A3 IIIABS/ESP warning light on because of sensors, with no real brake faultThe ABS or ESP warning light comes on intermittently or permanently on the cluster.
Source for the symptom in the Audi A3 III^[38]
- Medium severityOccasionalFrequency: OccasionalCitroën C3 IABS faults from sensors or wiring, and parking brake recall (late 2009)The ABS warning light can come on because of a faulty wheel sensor or corroded wiring at the connector.
Source for the symptom in the Citroën C3 I^[39]
- Critical severityRareFrequency: RareCitroën C3 IIPlastic debris in the ABS/ESP hydraulic unit with a risk of loss of control (March-April 2016 production)The official notice does not detail any prior symptoms; it describes the risk as a possible loss of control of the vehicle.
Source for the symptom in the Citroën C3 II^[40]
- Medium severityOccasionalFrequency: OccasionalFord B-MaxABS failure caused by the hydraulic unit and premature wear of the brake discsThe ABS warning light may come on when the hydraulic unit no longer modulates braking pressure properly, according to fiches-auto.fr.
Source for the symptom in the Ford B-Max^[41]
- Medium severityOccasionalFrequency: OccasionalFord Fiesta VRear brake drums that seizefiches-auto.fr documents ABS module and wheel sensor faults that can disable the system.
Source for the symptom in the Ford Fiesta V^[42]
- Medium severityOccasionalFrequency: OccasionalFord S-Max IElectronic faults on the S-Max: ABS/ESP warnings and steering wheel controlsABS/ESP warning lights on.
Source for the symptom in the Ford S-Max I^[43]
- Critical severityRareFrequency: RareJeep Compass MPBrake system hydraulic control unit (IBS) fault that reduces assistance and disables ABS (2020-2021 production)No specific prior warning is described: the risk is a loss of braking assistance and deactivation of the ABS function, which can light the ABS/ESP warning light.
Source for the symptom in the Jeep Compass MP^[44]
- Medium severityOccasionalFrequency: OccasionalKia Picanto IIIRear wheel hub ABS sensor failing at low mileageThe ABS/ESP warning light comes on when the wheel speed sensor built into the rear hub fails.Appears at around 36,000 km
Source for the symptom in the Kia Picanto III^[45]
- Medium severityOccasionalFrequency: OccasionalMazda MX-5 IVTraction and stability control (DSC) warning light that may not come on because of a hydraulic module software errorThe traction and stability control warning light may not illuminate when the system detects abnormal yaw, so the driver does not receive the warning.
Source for the symptom in the Mazda MX-5 IV^[18]
- Medium severityOccasionalFrequency: OccasionalMercedes-Benz Clase E W210Brake light switch failure with BAS/ASR and ABS/ESP warningsBAS/ASR (or ABS/ESP) warnings come on in the cluster and the brake lights may fail.
Source for the symptom in the Mercedes-Benz Clase E W210^[46]
- Medium severityOccasionalFrequency: OccasionalMercedes-Benz Clase S W221ABS and wheel speed sensor failureA faulty sensor usually turns on the ABS/ESP warning lights; the page does not describe the symptom explicitly, so this is a common inference and not information from the source.
Source for the symptom in the Mercedes-Benz Clase S W221^[47][48]
- Medium severityOccasionalFrequency: OccasionalMercedes-Benz CLK C209Sensor and electronics faults: airbag, ESP/ABS warning lights and parking sensorsESP/ABS or airbag warning light on, or parking and steering angle sensors that stop working.
Source for the symptom in the Mercedes-Benz CLK C209^[49]
- Medium severityOccasionalFrequency: OccasionalMercedes-Benz SLK R170Wheel sensor failure and other electrical faults on the SLK R170Dashboard warning lights on for no apparent reason and wheel sensor warnings.
Source for the symptom in the Mercedes-Benz SLK R170^[50]
- Critical severityRareFrequency: RareMINI Cooper F56The brake servo can fail due to a faulty weld (2023-2024 batch)If the shaft does fail, the ABS and the stability control (DSC) can lose assistance and light up their warning lamp.
Source for the symptom in the MINI Cooper F56^[51]
- Critical severityRareFrequency: RareMINI Countryman F60The brake servo may fail because of a defective weld (2023-2024 batch)If the shaft does fail, the ABS and the stability control (DSC) may lose their assistance and light up their warning lights.
Source for the symptom in the MINI Countryman F60^[52]
- Medium severityOccasionalFrequency: OccasionalRenault Twingo IIElectrical faults: faulty alternator and ABS systemThe ABS warning light comes on or the battery stops charging because of a faulty alternator.
Source for the symptom in the Renault Twingo II^[53]
- Medium severityOccasionalFrequency: OccasionalSeat León IIABS/ESP warning light coming on intermittentlyThe ABS and/or ESP warning light comes on in the instrument cluster, sometimes intermittently.
Source for the symptom in the Seat León II^[54]
- Medium severityOccasionalFrequency: OccasionalŠkoda Octavia IABS/ESP system faultsABS or ESP warning light on the dashboard, as described by the surveyed owners themselves.
Source for the symptom in the Škoda Octavia I^[55]
- Medium severityOccasionalFrequency: OccasionalVolkswagen Polo IVRear drum brakes can seize and the ABS can fault intermittentlyThe ABS warning light comes on intermittently, especially in damp conditions, without the fault being permanent.
Source for the symptom in the Volkswagen Polo IV^[56]
- Medium severityOccasionalFrequency: OccasionalVolvo XC90 ISteering angle sensor failure that turns on the DSTC warning light and disables stability controlThe DSTC light (Volvo's stability and traction control) stays permanently on.Repair (garage): €200–€350
Source for the symptom in the Volvo XC90 I^[57]
- Low severityCommonFrequency: CommonAudi TT IInstrument cluster and on-board electronics faults (pixels, ESP and airbag warning lights)Dead pixels on the cluster display, ESP or airbag warning light on for no apparent reason and erratic temperature readings.
Source for the symptom in the Audi TT I^[58]
- High severityRareFrequency: RareBMW Serie 1 E87ABS/DSC module failureABS and stability control (DSC) warning lights permanently on.Repair (garage): €2,100
Source for the symptom in the BMW Serie 1 E87^[59]
- High severityRareFrequency: RareBMW Serie 4 F32ABS and DSC system faultsThe ABS/DSC warning light comes on.
Source for the symptom in the BMW Serie 4 F32^[60]
- High severityRareFrequency: RareCitroën C3 PicassoImpurities in the ABS/ESP hydraulic circuitThe ABS or ESP warning light comes on.
Source for the symptom in the Citroën C3 Picasso^[61]
- High severityRareFrequency: RareFiat 500eIBS module fault that can cause loss of ABS (September 2021 campaign)The ABS warning light may come on if the system detects the IBS module fault; the campaign itself describes no other warning symptoms.
Source for the symptom in the Fiat 500e^[62]
- High severityRareFrequency: RareRenault Twingo IIIESP operating problem (built up to December 2014)ESP warning light coming on or behaving abnormally, consistent with an operating problem in this system.
Source for the symptom in the Renault Twingo III^[63]
- High severityRareFrequency: RareSeat AlteaThe ABS/ESP self-diagnosis function might fail to detect a real system faultThe ABS/ESP warning light should come on if the system fails, but the inadequate self-diagnosis function might fail to detect a real fault and not warn the driver.
Source for the symptom in the Seat Altea^[64]
- Low severityOccasionalFrequency: OccasionalAudi A5 IMMI screen, radio and on-board electronics faultsIn some cases ABS/ESP warning lights appear alongside the fault.
Source for the symptom in the Audi A5 I^[65]
- Low severityOccasionalFrequency: OccasionalDacia Duster IABS/ESP and handbrake warning lights coming on for no reason, and an erratic fuel gaugeThe ABS, ESP and handbrake warning lights come on together intermittently, without the car showing a real braking fault.
Source for the symptom in the Dacia Duster I^[66]
- Medium severityRareFrequency: RareFord S-Max IIElectric parking brake faults and ABS/ESP warnings caused by wheel sensorsfiches-auto.fr includes one case of an ABS/ESP warning caused by wheel sensors giving inconsistent readings.
Source for the symptom in the Ford S-Max II^[67]
- Medium severityRareFrequency: RareHonda Accord VIIIABS unit fault warning light on the Honda Accord VIIIABS warning light on due to a fault in the hydraulic unit, at around 150,000 km.
Source for the symptom in the Honda Accord VIII^[68]
- Medium severityRareFrequency: RareJaguar XEWheel speed sensor faults with ABS and stability control warningsThe ABS, ESP or driver assistance warning lights come on together, and brake assist may be disabled.
Source for the symptom in the Jaguar XE^[69]
- Low severityOccasionalFrequency: OccasionalPeugeot 1007Door contact faults and ABS/ESP warnings on the Peugeot 1007The ESP/ASR or ABS warning lights come on, the car thinks a door is open and other functions fail.
Source for the symptom in the Peugeot 1007^[70]
- Medium severityRareFrequency: RareToyota C-HR IIThe ABS can be deactivated by a wheel sensor or wiring faultThe ABS warning light comes on and the system is deactivated when the control unit detects inconsistent or missing wheel speed data.
Source for the symptom in the Toyota C-HR II^[71]
- Low severityRareFrequency: RareCitroën C6ABS sensor failure on the Citroën C6ABS or ESP warning light on.
Source for the symptom in the Citroën C6^[72]

Which cars it appears in

This fault affects the 1.8 Hybrid. We have documented 1 model from 1 make with some of the affected versions: open yours to see all its faults.

Engines

1.8 HybridToyota and Lexus1 fault with this symptom

Cars with the affected versions

Toyota

Toyota Prius IIIEngine: 1.8 HybridYears: 2009–2015

ABS/ESP light: causes in your car

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

Audi 6

BMW 7

Citroën 5

Dacia 3

Fiat 1

Fiat 500e

Ford 6

Honda 1

Honda Accord VIII

Hyundai 2

Jaguar 1

Jaguar XE

Jeep 1

Jeep Compass MP

Kia 3

Mazda 1

Mazda MX-5 IV

Mercedes-Benz 4

MINI 2

Opel 2

Peugeot 2

Renault 5

Seat 2

Škoda 1

Škoda Octavia I

Toyota 2

Volkswagen 5

Volvo 1

Volvo XC90 I

ABS/ESP 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

Can I pass the MOT with the ABS light on?

No. A DEKRA ITV engineer consulted by Autofácil explains that the car fails if the light does not go out with the engine running or if the system detects a fault. (ITV is the Spanish equivalent of the MOT.)^[7]

Do the brakes still work with the ABS light on?

Yes, conventional braking still works: Motor.es explains that the ABS works alongside the normal brakes, and RACE says you can normally keep driving. What you lose is the anti-lock assistance, so under hard braking the wheels can lock and you can lose steering control.^[1][8]

How is the ABS light related to the ESP light?

Very closely. RACE points out that traction control and stability control depend on the ABS, and Motorpedia explains that the failure of an ABS sensor also affects those systems. That is why an ABS fault can appear together with other warning lights.^[3][4]

How does a workshop diagnose an ABS fault?

It connects a scanner to the ABS system to read the fault codes, see the speed of each wheel in real time and activate the solenoid valves and the module's pump to check they work, according to Motorpedia. RACE specifically recommends an electronic diagnosis.^[1][4]

How much does it cost to fix an ABS fault?

According to RACE (Spanish prices), replacing a sensor costs between €50 and €150, while repairing the control unit can exceed €500 and replacing the module or valve block ranges from about €700 to about €2,000. The most common cause is the sensor.^[1][3]

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.

1.Testigo de ABS: qué es y causasRACE · Motoring press · published 26 May 2026 · consulted 4 October 2026 · in Spanish
2.He pegado un frenazo y ahora no se apaga el testigo del ABS. Sí, puedo seguir circulando pero, no, no lo debo dejar para luegoMotorpasión · Motoring press · published 4 March 2026 · consulted 4 October 2026 · in Spanish
3.¿Qué es el ABS de un coche y para qué sirve?RACE · Motoring press · published 11 December 2023 · consulted 4 October 2026 · in Spanish
4.Sistema de frenos ABS: cómo funciona y cómo diagnosticarloMotorpedia · Other source · published 2 April 2026 · consulted 4 October 2026 · in Spanish
5.¿Qué es el ABS de un coche?Autodoc Club · Technical documentation · published 10 September 2026 · consulted 4 October 2026 · in Spanish
6.Se ha encendido un testigo luminoso en el cuadro de instrumentos del coche, ¿qué significa?RACE · Motoring press · published 18 November 2022 · consulted 4 October 2026 · in Spanish
7.¿Puedes pasar la ITV con un testigo encendido? Nos responde el expertoAutofácil · Motoring press · published 11 September 2025 · consulted 4 October 2026 · in Spanish
8.¿Qué es el ABS?Motor.es · Motoring press · published 24 April 2017 · consulted 4 October 2026 · in Spanish
9.Toyota Prius 3 : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 26 September 2026 · in French
10.Großer Kia-Rückruf: Erhöhte Brandgefahr beim SportageAutoservicepraxis · Motoring press · published 7 June 2021 · consulted 26 September 2026 · in German
11.Fiabilité et pannes de l'Opel Corsa 6 (2019-)Fiches-Auto.fr · Technical documentation · consulted 27 September 2026 · in French
12.Fiabilité et pannes de la Peugeot 208 II (2019-)Fiches-Auto.fr · Technical documentation · consulted 27 September 2026 · in French
13.Fiabilité et pannes du Ford Focus 2 (2004-2010)fiches-auto.fr · Other source · consulted 27 September 2026 · in French
14.Fiabilité Renault Laguna 2 : tous les problèmes et vices révélésfiches-auto.fr · Reliability study · consulted 27 September 2026 · in French
15.Fiabilité Citroën C4 (2021) : pannes et rappelsfiches-auto.fr · Technical documentation · consulted 27 September 2026 · in French
16.Llamada a revisión de los Renault Espace V, Talismán y Megane IV y los Dacia Dokker y LodgyFACUA · Consumer association · published 21 July 2016 · consulted 5 October 2026 · in Spanish
17.Tous les problèmes sur Dacia Lodgy (248 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
18.Check a vehicle recall (recalls dataset since 1992)DVSA (Reino Unido) · Official body · consulted 5 October 2026
19.Fiabilité et pannes de l'Opel Mokka (2020-)Fiches-Auto.fr · Technical documentation · consulted 27 September 2026 · in French
20.Volkswagen Jetta (2008 - 2010): ABS/ESP, conexión a masacar-recalls.eu · Other source · published 13 July 2017 · consulted 5 October 2026
21.Todos los problemas del Audi Q4 e-tron (4 testimonios)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
22.Common faults with the BMW 3 Series and why a third-party warranty makes senseWarrantywise · Other source · published July 2025 · consulted 26 September 2026
23.Tous les problèmes sur Bmw Série 5 1995-2003 (317 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
24.Tous les problèmes sur BMW Serie 7 2015-2022fiches-auto.fr · Other source · consulted 5 October 2026 · in French
25.Tous les problèmes sur Bmw X5 2007-2013 (152 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
26.Tous les problèmes sur Bmw X6 2008-2014 (128 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
27.Ford C-Max MK1 (2003 – 2010): Probleme & Schwachstellengebrauchtwagenberater.de · Other source · published 5 February 2023 · consulted 27 September 2026 · in German
28.Hyundai Tucson (2007-2009): brake light switch recallcar-recalls.eu · Other source · published May 2013 · consulted 5 October 2026
29.Kia Carens (2006-2011): recall, brake light switchcar-recalls.eu · Other source · published 23 May 2013 · consulted 5 October 2026
30.Fiabilité Renault Kangoo 2 : tous les problèmes et vices révélésfiches-auto.fr · Reliability study · consulted 27 September 2026 · in French
31.Fiabilité Renault Mégane 3 : que vaut le modèle en occasion ?Caradisiac · Motoring press · published 25 November 2015 · consulted 27 September 2026 · in French
32.Toyota Prius (XW30)Wikipedia · Other source · consulted 5 October 2026
33.VW Caddy III (2K) | Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · published 21 April 2023 · consulted 27 September 2026 · in German
34.Used Volkswagen Passat (Mk8, 2014-2021) review and buyer's guideAuto Express · Motoring press · consulted 27 September 2026
35.Fiabilité Volkswagen Touran (2003-2010): pannes et témoignages de propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
36.Audi A3 (1996-2003): pannes et problèmes (232 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
37.Audi A3 (8P): Schwachstellen und KaufberatungGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
38.Frenos Audi A3: fallas y solucionesOpinautos · Owners' forum · consulted 27 September 2026 · in Spanish
39.Fiabilité Citroën C3 (2002-2009) : pannes et rappelsfiches-auto.fr · Technical documentation · consulted 27 September 2026 · in French
40.Citroën C3 RecallsAutoinsider · Other source · consulted 27 September 2026
41.Fiabilité et pannes du Ford B-Max (2012-2017)fiches-auto.fr · Other source · consulted 27 September 2026 · in French
42.Fiabilité et pannes du Ford Fiesta (2002-2008)fiches-auto.fr · Other source · consulted 27 September 2026 · in French
43.Fiabilité Ford S-Max (2006-2014): 204 témoignagesfiches-auto.fr · Other source · consulted 4 October 2026 · in French
44.Jeep Compass : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
45.Tous les problèmes sur Kia PICANTO 2017 (18 témoignages)Fiches-auto.fr · Reliability study · consulted 27 September 2026 · in French
46.Mercedes-Benz W 210Wikipedia · Other source · consulted 5 October 2026 · in German
47.Mercedes Classe S 2005-2013: tous les problèmes (témoignages de propriétaires)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
48.Mercedes-Benz S-Class (W221)Wikipedia · Other source · consulted 5 October 2026
49.Mercedes CLK (2002-2009): testimonios de averíasfiches-auto.fr · Other source · consulted 5 October 2026 · in French
50.Mercedes SLK (1996-2004): testimonios de averíasfiches-auto.fr · Other source · consulted 5 October 2026 · in French
51.Mini Cooper (2023-2024): soldadura defectuosa del servomotor de frenosCar-recalls.eu · Other source · published January 2025 · consulted 27 September 2026
52.Mini Countryman (2023-2024): soldadura defectuosa del servomotor de frenosCar-recalls.eu · Other source · published January 2025 · consulted 27 September 2026
53.Tous les problèmes sur Renault Twingo 2 2007-2014 (409 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
54.Fiabilité Seat : avis et pannes recensés par les propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
55.Tous les problèmes sur Skoda Octavia 1997-2004 (87 témoignages)Fiches-auto.fr · Reliability study · consulted 27 September 2026 · in French
56.Tous les problèmes sur Volkswagen Polo IV 2001-2009 (341 témoignages)fiches-auto.fr · Other source · consulted 27 September 2026 · in French
57.Problemas del Xc90 | Fallos y averías más frecuentesTotal Renting · Other source · consulted 5 October 2026 · in Spanish
58.Tous les problèmes sur Audi TT 1998-2006 (149 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
59.Fiabilité BMW Série 1 (2004-2011): pannes et avis de propriétairesFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
60.Tous les problèmes sur Bmw SERIE 4 2013-2020 (103 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
61.Tous les problèmes sur Citroën C3 Picasso 2009-2017fiches-auto.fr · Other source · consulted 5 October 2026 · in French
62.Tous les problèmes sur Fiat 500e 2020 (22 témoignages)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
63.Renault Twingo: Probleme, Schwachstellen und RückrufeGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
64.Seat Altea (2004 – 2015) | Bekannte Probleme & RückrufeGebrauchtwagenberater.de · Reliability study · consulted 27 September 2026 · in German
65.Fiabilité Audi A5 (2007-2016) (239 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
66.Fiabilité Dacia Duster (2010-2017)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
67.Fiabilité et pannes du Ford S-Max 2 (2015-)fiches-auto.fr · Other source · consulted 27 September 2026 · in French
68.Tous les problèmes sur Honda Accord 2008-2015 (57 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
69.Tous les problèmes sur Jaguar XE 2015 (testimonios de propietarios)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
70.Tous les problèmes sur Peugeot 1007 2005-2009 (86 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
71.Toyota C-HR II : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
72.Tous les problèmes sur Citroën C6 2005-2012 (151 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French