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Old 10-24-2013, 02:32 PM   #6
gmtech1
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Re: 2004 cts tc light

Quote:
Originally Posted by msca1627 View Post
I took it 2 advance auto and they checked and it was a po318 rough road sensor .
P0318 is a start and can be set by a wheel speed sensor as the ECM monitors wheel speed as part of it's misfire data. If the Traction Control light came on, there should be a code stored in the EBCM. The parts stores usually cannot read EBCM data. There may be a speed sensor code stored.
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