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Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 17017
Experience:  15 years GM master tech
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Chevy Impala with Service Control System Light On.

Customer Question

2004 Chevy Impala service control system light comes on.
What could be the problem?
Submitted: 10 months ago.
Category: Chevy
Expert:  Gary replied 10 months ago.

Welcome! My name is ***** ***** I will do my best to assist you with this problem.
Ask me about added features such as phone contact anytime if you wish!
Which exact light or message will come on? Service rid control or traction control ?

Customer: replied 10 months ago.
Traction control
Expert:  Gary replied 10 months ago.
When will the light come on? Taking off from a stop ? or ?

have the codes been checked in the ABS computer yet ?

Customer: replied 10 months ago.
The light comes on out of the blue
Customer: replied 10 months ago.
Do u know the solution
Expert:  Gary replied 10 months ago.

99 % of these are caused by one of the front ABS wheel speed sensors going bad and giving a wrong signal and the ABS computer thinks a wheel is spinning too fast when it is not and will trigger that light

the fix for this is having the codes read out of the ABS computer and it should tell you which front wheel sensor is acting up and would need to be changed.

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