Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Car Problem Reports
Chevrolet Monte Carlo Check Engine Light Due to Gas Cap Issue
Chevrolet Monte Carlo Problem
5 Reports
Model Years Affected: 1996, 1997, 2001
Average Mileage: 115,000 mi (110,000 mi - 120,000 mi)
Verified
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jillmf65, 1996 Chevrolet Monte Carlo, 110,000 miRookie
check engine light on for 2 years...changed gas cap 2 times..didnt fix issue
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Visitor, 2001 Chevrolet Monte Carlo, 120,000 mi
If gas cap is not screwed back on tightly after getting gas, engine light comes on. After screwing on correctly and driving a while the light will go off. Can take a day or two for light to go off, unless a lot of driving is done.
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