I have a 2006 chevy impala and i will be driving and the traction control system light comes on and then a display will say engine power down and car slowes down i will stop and cut car off for a mintute and start back going
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Reduced power is a problem with electronic throttle contol . drive by wire . Do you know what this is ? Taking the vehicle an having it hooked up to diagnostic tool an checking for DTC'S - diagnostic trouble codes is always a first step when trying to find the root cause of any trouble light ! And not auto zone , pep boys , or advance auto parts . Thier diagnostic tool will not check codes in all system control modules .
I experienced a similar problem on that very same vehicle. It ended up being a bad EBCM (electronic brake control module). It had a fault on the data line and caused all sorts of electrical issues. The majority of traction light problems with impalas are usually bad WSS's (wheel speed sensors fronts), but doesn't always indicate a power loss problem. They are also very problematic with salt intrusion in the harnesses. I'd first get it scanned at a large parts retailer to see if its a "U" code (loss of communication thus data problem) or "C" code chassis ( probably bad WSS).
1. Defective, loose or missing fuel cap 2. EVAP canister broke, hose cracked or not connected 3. Purge or vent solenoid defective 4 . Vacuum leak at engine po121 code po121 means Throttle Position Sensor/Switch A Circuit Range/Performance Problem . it is usually indicative of a faulty throttle position sensor or faulty wiring harness in the engine bay.
i fixed mine by pulling each and every fuse in all the fuse boxes and replacing them with new ones. the hhr fuses have a tendency to work loose and cause all kinds of little problems. i searched the forums for the answer to the traction control light problem and never found an answer that worked until i talked to a "shade tree" mechanic in my area and he told me to do the fuse thing. been a month now and no more problems.
It sounds like these things are all related. When the a computer sees a problem in the Electronic throttle system, it will dissable traction control, and give the reduced engine power alert because the powertrain computer does not know the value of throttle postion.
Codes will need to be scanned in the computersto begin diagnosis.
TechJK
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