Good advice.
Clear check engine light
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5th Gear
Joined: Jun 2009
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Clear check engine light
I understand that I can clear a check engine light (might be gas cap) by disconnecting the battery is this true? What will I have to reprogram if I disconnect the battery? Should I disconnect the positive, negative or both?
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If it is the gas cap AND you replace the gas cap with a good one. The code will clear itself after a few "cycles" of the ignition.
Elmer
Elmer
Melting Slicks
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From: NJ..."the way I saw it, everyone takes a beating sometimes."
I wouldn't clear anything until you know exactly what the code is. Don't just assume it's the gas cap. If you have an Autozone near you, they scan cars for free.
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I got a 'check engine light' last week, went to the dealer and the service manager plugged in his code reader and immediately knew that I had installed a cags eliminator fuse. He told me it was no problem, cleared the code and the light went out. He did tell me that the light might come back on if I keep using the fuse. Well today the light came back on, I pulled the cags eliminator fuse and replaced it with the original normal one. I intended to go to the dealer to have him re-set the code again but after two start cycles the light went out so I assume it re-set itself. I'm due for an oil change so I guess I'll have him check it again to make sure.
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
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I got a 'check engine light' last week, went to the dealer and the service manager plugged in his code reader and immediately knew that I had installed a cags eliminator fuse. He told me it was no problem, cleared the code and the light went out. He did tell me that the light might come back on if I keep using the fuse. Well today the light came back on, I pulled the cags eliminator fuse and replaced it with the original normal one. I intended to go to the dealer to have him re-set the code again but after two start cycles the light went out so I assume it re-set itself. I'm due for an oil change so I guess I'll have him check it again to make sure.
Elmer
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
If the light went out, the problem went away BUT there is still a record of the light in the ECM. If you clear the codes then the "trail" is gone. So, putting in a properly functioning fuse allowed the light to go off, I'd guess that may have been the cause. It is always best to get the SES read to make sure nothing else is lurking to fizzle out on you.
