Skip the auto shop - Our mechanics make house calls

Q: ABS light on

asked by on

The ABS light is on, and I just had the wheel speed sensors replaced.

There is a technical service bulletin (TSB) GM has put out concerning a bad ground to the electronic brake controller module or EBCM. This causes a loss of communication and sets the ABS light. There are fault codes associated with this condition so fault codes should be read out.

If the reading out of the fault codes match the ones specified in the bulletin, then the ground for the EBCM on the underside of the frame should be cleaned and reconnected. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the equipment and training to diagnose your ABS light and carry out the necessary repairs.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: on/off humming buzzing noise on highway

Hey there, it looks like there was a problem with the link you added. However, from what you described, it sounds like the noise may be the cooling fan coming on and off as you are driving. Check the cooling...

Q: Service AdvaceTrac Warning Light is on in my car

Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car's ECU. When the ECU...

Q: Engine knocking noise in 2003 Honda Civic

A knocking noise is never a good sign on an engine. If the sound appears once, then the engine is started and gets louder when you rev the engine then it may be a rod knock meaning that the engine...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.