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 06-21-2004, 07:14 PM   #1
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Default Code 31

Ok so here'* the deal the last couple of days my car has been missing. I think it'* a spark plug wire that keeps popping off. Well today I decided to pull codes and came up with a 31. What exactly is it? The car is running fine now and I snapped my plug wire back on.
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Old 06-21-2004, 07:26 PM   #2
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Park/Neutral safety switch. It means you can shift out of park without your brake being applied (because the switch is faulty/misadjusted). Most likely. Ignore it.
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