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post #1 of (permalink) Old 06-18-2008, 12:23 PM
Mom_to_2!'s Avatar
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Check engine light on a 2002 Chevy Impala?

Does anyone know how many key cycles it takes before the check engine light goes off? My light came on Monday morning and has not gone out yet. I got gas Monday afternoon, thinking it could have been my gas cap, but it is still on. I called the dealership and they told me to give it a few more days. Is there anything else that I can try that may turn off the light?

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post #2 of (permalink) Old 06-18-2008, 12:23 PM
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try unhooking the battery for a little bit that should reset the computer,just unhook the red positive
post #3 of (permalink) Old 06-18-2008, 12:23 PM
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Unhooking the battery is a waste of effort and doesn't work, sometime after 1995 - 96, when OBD II scanners became the diagnostic tool, following OBD I. Only the scanner turns off the light, for significant or specific problems and trouble codes, other than gas cap. A new cap with proper seal will solve the problem, after which the light (computer) is programmed to go off in use - right, after so many key cycles, but in about 3 days of driving. You have to fix the problem first.
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