Posted: Tue May 29, 2012 5:38 pm Post subject: ABS, Service Traction Lights
I apologize in advance if this has been covered some place else here and I just missed it.
I recently had a wheel bearing replaced at a GM dealership on my 2004 Impala LS that was supposed to solve an issue with my Service Traction Light, Traction Light and ABS light.
About a week later the issue with the traction control kicking on when I turned left was gone, however I am still having the lights come on.
Just today in a short period of time, the ABS, Traction and Service Traction lights came on three times in less than 30 minutes. Each time I turned the car off and removed the key before restarting. The lights went out each time but returned within a few minutes of driving.
I'm hoping the lights will come on later tonight and I'll get it to a friends house where he has a Code Reader to see if that pinpoints the problem but I was wondering if any of you might have an immediate reaction to this description and know exactly what it is?
Sometimes there is a poor ground for the ABS computer. I couldn't tell you where exactly that is located, but a few people have had recurrent ABS/TCS light issues and regrounding the computer helped. It might also be worth looking into the wiring to the wheel hubs, it can get chewed up and cause all sorts of headaches.
Protip: If you don't know what you're doing, don't do it.
I would have thought if the wiring to the wheel hubs were bad they would have caught that when they changed my bearing. I've never known a dealership to turn down an opportunity to do more work when possible.
I took the car for a nice long drive this evening and as my luck would have it, no lights came on. So I continue to be baffled at this point.
Maybe I should go buy my own code reader and keep it with me at all times just in case it happens again. I'm starting to think it's more likely a computer or sensor issue but that's only a guess.
A proper scantool (not the cheapo autozone ones) will tell you which hub is giving you issues. I'd pull all of the plugs and try to sand off any corrosion, and put them back together with a little dielectric grease.
Possibly an issue out of another hub? I had the same issues a couple years ago in my 04 SS, and ended up having 3 of the 4 hubs replaced as they were all on their way out the door. I got lucky with having a really nice extended warranty, and my tech at the dealer would look for other stuff that was wrong and fix it all at once. This is also how they found my steering gear was leaking, as well as one of the trans cooler lines leaking. So, since I took it in with that problem, they went ahead and checked all the hubs at the same time.
Would that cause the horn not to chirp when you lock the car or set off the alarm?
I noticed that when the abs/trac goes off the horn stops working. Yes the horn still works when you push it down. i have also noticed that every now and then the speedometer wants to read 10 mph over what your doing. Weird?
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