Monte Carlo

Check Engine Light Due to Gas Cap Issue on Chevrolet Monte Carlo

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 115,000 (110,000–120,000)
3 model years affected: 1996, 1997, 2001
7 people reported this problem
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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.