intermittent CEL and Traction light - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-07-2008, 12:07 AM   #1
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Default intermittent CEL and Traction light

So, about a week ago i got a CEL... I pulled out the scanner, and it said that the 02 sensor voltage was too low. so, i went back to checker and replaced the 02 sensor for free (under the 1 year warranty.. It'* a Bosch, and i bought it before i joined the forum ) Tthe CEL went away, and all seemed well.
A day or two after that, my "Traction Off" light came on when i started the car after school. I though i may have had a WSS go bad, but when i started the car up the next time, the light was off and Traction Control worked (yes, i tested it ).
Today, driving home both my CEL and my Traction light came on at the EXACT same time. Now, i have a hard time believing they would come on at the same time out of coincidence. So, my question is what would cause these to both come on at the same time?
I cleaned both my drivers and passenger side ground Bus about a month ago.
The only thing that came to my mind is the junkyard PCM i have in there. The first one i got from them was REALLY bad, the car would seem to hit a rev limiter at random RPMS at WOT. I think it may have had the wrong gear ratio. (come to think of it, idk if this one is the same as my real ratio either.. but it seems to shift fine.)

So... suggestions? thoughts?
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Old 03-07-2008, 12:15 AM   #2
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Have you checked and cleaned all your battery connections? both ends of the cables. Start there and see what you find.
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Old 03-07-2008, 12:18 AM   #3
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ah, yes. i meant to include that when i mentioned the grounds.. i did that also
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Old 03-07-2008, 05:07 PM   #4
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bump?
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Old 03-19-2008, 10:38 PM   #5
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bumpx2?
i found about 10 threads with other people with the same problem... mostly unresolved.
Battery connections and Ground Buses are clean.
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Old 03-19-2008, 10:40 PM   #6
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First, quit bumping such a new topic. We don't get paid to be here, and we have lives away from here.

Second, why is there a mechanical topic posted in General Chat? Please read the Forum descriptions.
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Old 03-19-2008, 10:43 PM   #7
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its almost 2 weeks old... and pretty buried... lets be realistic, topics out of the top 10 dont really get much attention

I figured it was general chat since im not really sure its technically mechanical... possibly electronic, or sometihng. But i guess its still considered mechanical... I do read the descriptions, i just had a bad interpretation i guess
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Old 03-19-2008, 11:08 PM   #8
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did you pull the codes from the last time it did it?
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Old 03-19-2008, 11:12 PM   #9
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yup.. 02 sensor voltage low. But i replaced it twice.. once with bosch, and once with AC delco. And even if it really was bad, what does that have to do with traction control? it leads me to belive there is a bigger issue.

there was also a stored code for "brake switch failure"
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Old 03-19-2008, 11:17 PM   #10
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they have nothing to do with eachother, but there is no reason they can't both be on.
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