warning light guide
Traction Control (ESP) Warning Light
A solid light means the electronic stability and traction system is switched off or faulty. Your normal brakes still work, but the car will not automatically correct skids or wheelspin.
What it looks like: An amber symbol showing a car with wavy skid marks behind it. A flashing light means the system is actively preventing wheelspin, while a steady light means the system is deactivated or has a fault.
Updated 9 November 2026
Can I keep driving?
Service soon
Your normal brakes still work, but you have lost computer-assisted skid recovery and traction control on slippery surfaces.
What to do right now
- 1Ease off the accelerator gently and avoid sudden steering or heavy braking if the light is flashing.
- 2Check whether the traction control button on your dashboard or centre console was pressed by accident.
- 3Find a safe place to stop, turn the engine off, wait two minutes, and restart to see if the light resets.
- 4Drive with extra caution in wet, icy, or loose conditions while the solid light remains illuminated.
Likely causes
Most likely first.
- Likely
Faulty wheel speed sensor
Wheel speed sensors track how fast each tyre spins. Dirt, corrosion, or wiring damage stops the sensor sending a signal, causing the computer to shut down the traction system as a precaution.
- Likely
Active wheel slip or loss of grip
Accelerating on ice, wet tarmac, or loose gravel causes the tyres to break traction. The light flashes rapidly while the system cuts engine power and brakes individual wheels to regain grip.
- Possible
Damaged reluctor ring or wheel bearing
The sensor reads its signal from a toothed or magnetic ring on the axle or wheel bearing. Road salt and rust can crack or corrode the ring, breaking the reading.
- Possible
Steering angle sensor fault
The stability computer compares your steering wheel position to the direction the car is travelling. If the steering angle sensor loses calibration, the computer cannot verify vehicle direction and disables stability control.
- Possible
System turned off manually
Most cars have a physical switch or touchscreen menu to disable traction control for driving in deep snow or mud. Switching it off keeps the amber light steadily lit.
What you can check yourself
Park somewhere safe and level, engine off, before you start.
- 1
Press the traction control button
Locate the button marked ESP, ESC, or TC on your dashboard or centre console. Press or hold it for three seconds to ensure the system was not switched off by mistake.
- 2
Check all four tyre pressures
Use a pressure gauge to confirm all tyres match the pressures on your door pillar sticker. An underinflated tyre rotates at a different speed than the others, which can confuse the stability computer.
- 3
Inspect tyres for uneven wear
Check that tyres on the same axle have similar tread depth and matching sizes. Substantial differences in tyre circumference trick the sensors into reading constant wheel slip.
- 4
Restart the car
Park safely, switch off the ignition, and remove the key for two minutes before restarting. A transient software glitch or temporary sensor glitch may clear itself on reboot.
Rough cost to fix
Rough estimateTypical prices in Ireland (€) and the UK (£), from an independent garage up to a main dealer. The total bill depends mainly on whether the issue is a simple external sensor or a worn wheel bearing that requires pressing out with garage tools.
ABS wheel speed sensor replacement
- Do it yourself
- €30–90£25–75 in the UK
- At a garage
- €110–240£90–200 in the UK
ABS reluctor ring or wheel bearing replacement
- Do it yourself
- Garage job
- At a garage
- €160–380£140–320 in the UK
Steering angle sensor replacement and calibration
- Do it yourself
- Garage job
- At a garage
- €220–520£190–450 in the UK
When to go to a garage
- The traction control light stays on constantly alongside the ABS and brake warning lights.
- The car pulls to one side or unexpectedly grabs a brake while driving normally on dry roads.
- The light remains illuminated after restarting the car and checking tyre pressures.
- A scan shows fault codes relating to internal brake pump or steering column hardware.
Questions drivers ask
Can I drive my car with the traction control light on?
Yes, you can usually drive if the light is solid amber and the red brake warning light is off. Standard hydraulic braking still functions as normal. However, you will not have electronic assistance if the car skids, so take extra care on wet roads and roundabouts.
Will a traction control light fail the NCT or MOT?
Yes, a permanently illuminated traction control or electronic stability control warning light is an automatic failure on both tests. Testers check dashboard warning lamps during the initial inspection, so the underlying fault must be fixed and cleared beforehand.
Why does the light flash when I accelerate hard?
A flashing light means the system is working properly rather than having a fault. Your wheels have momentarily lost grip, and the computer is managing engine power and applying minor brake pressure to keep the car stable.
Can wheel alignment cause the traction control light to come on?
Yes, poor wheel alignment can trigger the light. If the car drives straight while the steering wheel is visibly off-centre, the stability computer detects a mismatch between your steering angle and vehicle direction, logging a fault.
Test rules here are for the National Car Test in Ireland (NCT) and the MOT in the UK. Elsewhere, check the regulations of your own country or state before going for a vehicle test.
Related warning lights
Get an answer for your own car
Tell the AI Technician your make, model and what you are seeing. It works out the likely cause, the tests and the fix for your car.
Free with an AutoQ Pro account. Answers in about ten seconds.
General guidance for most cars, not a diagnosis of yours. Details differ by make, model and year - check your handbook, and if in doubt, don't drive.