Chevrolet Monte Carlo Problem Report

Chevrolet Monte Carlo Check Engine Light Due to Gas Cap Issue

(5 reports)

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

check engine light on for 2 years...changed gas cap 2 times..didnt fix issue -
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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