How do I resolve a "Service Traction System" problem in my 2005 Impala?
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I have a sporadic problem which occurs about every 15 to miles with my 2005 Impala. While driving at highway speeds the "Service Traction System" light comes ON at the same time as the "ABS" light and "Trac Off" light. My mechanic used a diagnostic reader to determine sensor fault of left front tire speed sensor. He replaced the whole hub/bearing assembly which contains the sensor. The identical problem and same sporadic occurrences persist. I've checked the wiring from the sensor up to the electrical module. I don't know if it's coincidence or not, however I also occasionally am unable to start the car when the "Security" light comes ON. I usually try several times or wait for 10 minutes with keys-switch in the ON position and then it will start. Any ideas on how to resolve the "Service Traction System" problem would be much appreciated. Thank you.
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i have the same problem. the scanner said the same front driver side. replaced hub assembly myself. then we cleared the codes. drove with no lights or "service traction system" going off at all. continued to drive around expecting the lights on the guage to come on again. it would go on and off. so as soon as it came on we scanned it again. right rear sensor this time, but the front driver side wasnt going off. after tons of research i found that a big problem people werent checking before having "mechanics" replace part after part was that the sensor "eye" that reads the teeth as it goes around gets dirty so its sending mixed signals to the computer. i read that its especially bad in the midwest. climate, dirt roads, etc. i have turned focus towards my gaskets for now. when i get the sensor cleaned and dielectric grease on it and tested is when we will see but so far everything i have done is working for the better. can of electrical cleaner spray is $9 at parts store.
The only code was "left front tire sensor fault."