Codes??? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

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Old 07-22-2003, 08:18 PM   #1
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Default Codes???

I see you guys (gals maybe?) talking about codes being wrong...or something along that line. What exactly do these codes relate to? Obviously something with the computers involved in the car but how could one find out if the codes are messed up?
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Old 07-22-2003, 08:38 PM   #2
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What is the year and trim line of your car?
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Old 07-22-2003, 09:07 PM   #3
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An error code is something that develops when your cars sensors begin to detect a malfunction. The sensor then sends a signal to the ECM/PCM on your car and generates a Check Engine Soon or Service Engine Soon light. The computers on our cars are fairly good devices and there are scantools that you can get to read the codes.

However, we need to know you year and trim level in order to accurately tell you what the computer is on your car (ie OBD1 or OBD2 etc)

Are you seeing any service lamps on your cluster?

FYI there is a listing of error codes in Techinfo, for any Bonneville for 87-93 or 94, after that the GM uipped the computers and it gets a bit more complex. Any AutoZone in the US will do a PCM scan free of charge. To bad we don't have that service in Canada
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