Code 31 - 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 12-13-2010, 07:23 PM   #1
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Default Code 31

I'm throwing a Code 31. What is this?
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Old 12-13-2010, 07:29 PM   #2
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Quote:
Originally Posted by teejay37 View Post
I'm throwing a Code 31. What is this?
Sounds like an oxygen sensor code.
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Old 12-13-2010, 07:42 PM   #3
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31 cam position sensor fault
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Old 12-13-2010, 07:42 PM   #4
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Found it:
31 cam position sensor fault

What could be the problem?
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Old 12-13-2010, 11:20 PM   #5
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Man I was way off...

I don't recall which years had it, but some years of the Series 1 3800 had a common failure of the camshaft sensor magnet.
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Old 12-14-2010, 12:00 AM   #6
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Well, start with checking the wiring. If that'* all ok, then changing the sensor may be in order.
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Old 12-14-2010, 12:28 AM   #7
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Okay. That'* what I was thinking. I mean it is a 93 so it'* probably about time for stuff to start going bad.
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Old 12-14-2010, 12:28 AM   #8
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Where'* it at?
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Old 12-14-2010, 01:14 AM   #9
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Not positive on a series1, but should be on the passenger side, under the water pump.
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