What does the ABS warning light mean?

Your anti-lock braking system has a fault and is disabled. Normal brakes still work, but you lose ABS, traction control, and often stability control.

Here's a quick, honest answer from a working UK mechanic — what causes it, what it costs to fix, and what to do next.

Will ABS light cause MOT failure? — Yes — since 2012 a permanently lit ABS warning lamp is an MOT failure.

Can a flat battery trigger the ABS light? — Yes. After a flat battery or jump-start the light sometimes latches on and needs clearing with a scan tool.

Bob's Mechanical Repairs — independent family-run garage in Birnam, Dunkeld, Perthshire. Call 01350 727 276 or email [email protected].