The amber ABS light means anti-lock braking is not working. Normal brakes should still work, but here is what to watch for and how it affects the MOT.
Looking for more detail? Our full guide covers this topic in depth, with step-by-step advice and sources.
The anti-lock braking system has a fault and is switched off. Normal braking usually still works, but wheels can lock in an emergency stop.
What it looks like
The letters ABS in a circle. Colour: Amber.
Common causes
- Faulty wheel speed sensor (very common)
- Damaged sensor wiring
- ABS pump or module fault
- Low battery voltage
What to do
- Drive carefully and leave extra stopping distance, especially in the wet.
- If the red brake light comes on as well, stop: it may be a more serious brake fault.
- Have it diagnosed. A wheel speed sensor is often an affordable fix.
Can I keep driving?
Yes, with care, if only the ABS light is on.
MOT
An ABS warning light showing a fault is an MOT fail.
Symbols vary slightly between makes. Always check your owner's handbook. General guidance only; if in doubt, call your breakdown provider.
Sources and further reading
Facts checked on 20 October 2026. Spotted an error? Tell us and we will correct it.