Re: 2006 Chevy HHR Traction Control Light and Check...
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.
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This is all electronically controlled by the PCM - engine computer an EBCM - electronic brake control module . An this will affect the transmission as well because everything is all hooked together electronically .
Engine Traction System Indicator
The instrument panel cluster (IPC) illuminates the TRAC OFF indicator when the electronic brake control module (EBCM) inhibits the Engine Traction System due to a malfunction in the Engine Traction System. The IPC receives a GMLAN message from the EBCM requesting illumination.
Your best bet is take it to a ASE certified repair shop or a GM dealer , Chevy , Buick , Cadillac . seeing how Pontiac isn't any more .
When mine started doing that ,t/c/ light on and off when I would hit a tiny bump or not shortly after I started loosing power steering also everything was out of whack .FIX for me was replacing both solenoids.$50 to $65.00 for both .Order online or Chevy dealer parts .Look at youtube video easy to put in step by step ,or pay $89.00 to have done for you.
Traction control usually uses part of your ABS brake system to function. Sometimes a dirty (or worn out) wheel sensor is the problem that triggers both "check engine" and "traction control"...This can be verified with the proper diagnostic meter, and many shops will perform this test for free...unfortunately the free check at the auto parts stores does not include reading the ABS/Traction sensors...sensor cost is about $65. sometimes they can be cleaned. Hope this helps.
Under the plastic cowl there is a rubber cover over the blower motor and cabin filter. May have shrank or been installed improperly during mfg. There is a fix available from Chevy. ( a larger cover) Could also be clogged sunroof drains if you have one. As far as TC light goes. It comes on when wheel spin is indicated. Usually if it is wet or snowy outside. If it is coming on randomly, there may be a fault and you should get it checked by the dealer. If this is happening, the check engine light should illuminate at the same time.
After searching around, I found several posts that suggested reseating all the relays and fuses under the hood. After checking, I noticed nearly all of them were not seated well. I pushed them all down and I haven't had the problem since.