Question about 2002 Chevrolet Impala

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2001 Impala No trac and ABS light on. Is this a dangerous problem?? Will the brakes stop working, or will it be ok until I can get it serviced?

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  • ventures100 Apr 13, 2009

    Trac Service and ABS light just came on. No noticeable issues with brakes which are just under 15 - 20 miles old.

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In the hub-bearing assembly (the part that the tire bolts on to and allows with tire to spin) there are sensors, they can and do fail. Also the wiring and connections can fail also. The only consequences of this problem being not fixed is that the ABS will not work (the breaks won't "pulse" when you start to skid) but you will still have breaks they will just work like regular conventional breaks that can lock the wheels, like in the cars of yore. Traction control will not work either, neither are serious but annoying. And the obvious the "service traction system" message will come up in the info box, the "traction off" light will be on and the "abs" light will be on. My dad's 02 impala has the same problem. A gm computer scanner can diagnose where the culprit lies. Good luck -Mike

Posted on Apr 20, 2009

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You have speed sensor that is bad

Posted on Feb 27, 2009

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2003 Chevy Impala Service Traction Sytem show on Dash


I can't answer the question about the gas fumes, but I had the same problem last year with the "Service Traction Sysytem" message and the Trac and ABS lights coming on in my Impala. Mine turned out to be because of a bad wheel bearing, that was causing the ABS and traction system not to work. I'm not sure if you've experienced this, but another thing that would happen with mine was that I would go to brake and have a hard time depressing the brake pedal, almost like it was pushing back. That is the point when the Trac and ABS lights came on.

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2 Answers

Trac off light- Hi, mom has a 2004 Chevy Impala and just started it and noticed a light on the dash came on reading, "Trac off". Do you know what this means? The dealer is trying to get my 73yr old mom to...


hi Deborah.
this is all i could find out from the internet.
ABS and Trac OFF usually indicate a dirty or faulty ABS wheel sensor. You'll have to scan for the codes to see why the check engine light is on.
the abs and trac is the wheel speed sensor, you will probably have to replace the hub.
Have you already checked your owners manual for troubleshooting? If not, page 3-35 has the section about your "Trac Off" message.

"If there's a brakesystem problem that is specifically
related to tractioncontrol, the tractioncontrol
system will turn off and the warning light will come
on. If your brakes begin to overheat, the traction
controlsystem will turn off and the warning light will
come on until your brakes cool down...
If the tractioncontrolsystem warning light comes on
and stays on for an extended period of time when the
system is turned on, your vehicle needs service."

not sure if this helps you out but its all i could find out.
sorry if its of no help to you.

Dec 03, 2017 | 2004 Chevrolet Impala

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