Skip the auto shop - Our mechanics make house calls

Q: ABS light on and off

asked by on

The ABS light is going on and off. It might be a bad sensor on the brakes.

The ABS light coming indicates a fault in the ABS system. Fault codes should be read out as this will guide the diagnosis. Possible causes for the ABS light coming on and off is a possible loss in wheel speed sensor signal at times, an intermittent hydraulic unit function, or a possible processing error in the 4Wheel Anti-lock Brake System Module (4WABS). You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have a scanner tool to interrogate the 4WABS module and then diagnose/repair the issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. ABS light on and off

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Why would my AdvanceTrac and ABS warning lights came on the exact same time?

Hi Barbara. Thanks for contacting us today. Usually when both of these warning lights illuminate, it's due to a wheel or speed sensor failure - as both contribute to the Advance Trac and ABS system. It's also possible that the...

Q: Tapping sound near brake pedal.

The clicking noise is one of the relays under the left side of the dash cycling on and off. I have seen aftermarket alarm relays do this and this may be the reason it is killing the battery. Most factory...

Q: Chevy Camaro runs rough and stutters

There are dozens of potential causes for your problem. You didn't specify the particular 02 sensor and cam sensor codes, so it's difficult for me to provide much advice. A problem with the timing (such as a stretched chain) could...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.