Question about 1999 Chevrolet Cavalier

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Check engine light remaining on all the time.

Check engine light came on last week. Changed gas cap and light went off for a few days and now has returned to constantly being lit. This is girlfriends car, she put gas in earlier in the day and soon after light returned.

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Sir, the best thing to do is take the car to an autoparts store and have them use a scan tool to retrieve the fault code(s) stored in the computer. Most part stores offer this service at no charge. That will narrow the problem down. Sure hope this helped and good luck.

Posted on Jul 21, 2009

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The check engine light comes on for over 200 different reasons, a defective or loose gas cap is just one of them, have the system tested for the trouble code that is stored whenever the light switches on.

Posted on Jul 21, 2009

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