1994 bonn - 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 11-15-2009, 08:39 PM   #1
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Default 1994 bonn

1994 bonn. 3800. idiking at 2500 rpms, engine codes= p1640 1650 1670.

pleasw help
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Old 11-15-2009, 09:39 PM   #2
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As I mentioned on the PM to you, Todd. Those are all PCM fault codes. First thing I would try is disconnect both battery cables, clean well, and reattach. This will also give the PCM time to reset, if it is going to.
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Old 11-15-2009, 09:40 PM   #3
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Check your throttle body and clean it, check the throttle position sensor, check the idle air control. make sure they are working and clean.
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Old 11-15-2009, 09:47 PM   #4
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i have done all the above mentioned except for cleaning the throtle body, ill try that next. thanks for any sugestions
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Old 11-15-2009, 09:54 PM   #5
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Are you sure on those codes? Those look like OBD2 codes. You have a OBD1 car,
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Old 11-15-2009, 09:54 PM   #6
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Todd, I just noticed, you provided trouble codes for OBD2. The 94 Bonneville has OBD1. Who gave you those?? They couldn't possibly come up on a '94.

EDIT: Dan beat me to it. LOL
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Old 11-15-2009, 10:03 PM   #7
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definatly a obd2 my buddy is a mech. and i watched him hook up a (modis?) scanner that cost 9000$ (so he says)and those were the only codes showing, i wrote them down. he suggested that for those 3 codes that it was probaly a bad computer or a wiring problem. i trust him and he is very good but he does not specialize in bonnevilles so i figured i would try you guys being that this is you specialty.
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Old 11-15-2009, 10:05 PM   #8
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That look to be OBD2 codes and those are in a 96+ car. Is it possible the engine was changed?
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Old 11-15-2009, 10:05 PM   #9
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definatly a obd2 i dont know what that banana is there for. lol
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Old 11-15-2009, 10:06 PM   #10
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I checked again, and they are actually 2000+ codes.

1640 Output Driver Module (ODM) Circuit 1 Error
1650 Output Driver Module (ODM) Circuit 2 Error
1670 Output Driver Module (ODM) Circuit 4 Error
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