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: 100,333 (88,000–123,000)
1 model year affected: 2005
4 people reported this problem
2 people shared problem details
2005 Buick Century123,000
check engine light came on. Mechanic checked code, cleared it and suggested we tighten gas cap to at least three "clicks". Three months later problem has not returned
2 people like thisFlag inappropiate
2005 Buick Century88,000
check engine light came on and stayed on code said vacume leak I replaced gas cap with new one and cleared code and light never came on again.
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