clear trouble codes - 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 08-14-2005, 07:17 PM   #1
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I can't find the proceedure to clear trouble codes for my 92 Bonneville SE in my GM Manual. Its not on the page stated in the index?
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Old 08-14-2005, 07:21 PM   #2
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If you have a history code stored in the ECM, it can be cleared by disconnecting the battery for about 15 minutes. If the Check Engine light is still on after that then you need to fix the problem that the computer is complaining about before clearing the history.
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Old 08-14-2005, 07:47 PM   #3
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The only other way to clear the codes is with a scantool.
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