Check Engine Light Due to Gas Cap Issue on Buick Century

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

RepairPal Verified
Average mileage: 164,202 (164,202–164,202)
1 model year affected: 1999
3 people reported this problem
1 person shared problem details
When I bought my car, I bought a locking gas cap. When I took my car to get it fixed, the guy told me to try the old gas cap and the check engine light went off.
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