"Throwing codes" - Pontiac GTO Forum
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post #1 of 3 (permalink) Old 10-16-2005, 03:03 AM Thread Starter
 
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"Throwing codes"

I'm a bit confused about these "codes"...

Whenever there is any sort of engine or emissions malfunction, will there always be a Check Engine light along with a "code"? Is it possible to get the Check Engine indicator without a corresponding code? Are these codes displayed on the DIC or can they only be read by scan tools?
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post #2 of 3 (permalink) Old 10-16-2005, 09:10 AM
Rob in CT
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Anytime your engine light comes on, there will be a code stored. If you have a drivability problem, but no check engine light, there usually isn't a code.
post #3 of 3 (permalink) Old 10-16-2005, 01:46 PM
 
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There also will be codes with no check engine light. I think these are minor codes that only happen for short times periods. An example would be a misfire that only happens once would throw a code but not trip the check engine light.
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