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The check engine light is illuminated for a reason. One of the engine control devices has probably ceased functioning. Take the vehicle to a shop for diagnosis, and repair of the problem.

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8y ago
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16y ago

Try either disconnecting the battery for about 10 minutes or have vehicle scanned to clear codes

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Q: How do you reset check engine light on 2003 4.3 blazer?
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How do you reset the check engine light on 1993 Subaru Justy?

After repairing the cause of the code, you can clear it with a scan tool.


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auto elec tech need cost about 40 to 45 pounds


How long after you reset the check engine light do the codes clear in your cars computer?

pretty much instantly. As soon as the codes are cleared the check engine light goes off and vice versa, unless there still is trouble. In this case the codes won't clear until the trouble is repaired.


The check engine light came on in my 2000 Pontiac sunfire and the code said that is was fuel emission not the gas cap what else could it be?

Thats the $50,000 question. It is not easy diagnosing todays engine faults because sometime all you have is a code and it will not point directly to a certain device. Did you drive your vehicle at least 50 miles and a couple of days to see if the check engine light goes out now that you tightened the fuel cap? The computer will not automaticaly reset the check engine light if you tighten the cap. It has to go through a certain amount of miles and cycles so it knows the problem is fixed so don't be too fast to rush to another fix here. If it stays on I start with an O2 sensor since it has a lot to do with emissions. That is where I go and from there diagnose that to see if it is working properly. Best I can do for you now...............


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