Check Engine Light Due to Gas Cap Issue on Buick Regal

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

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Average mileage: 178,688 (178,688–178,688)
3 model years affected: 1996, 2001, 2004
4 people reported this problem
1 person shared problem details
2004 Buick Regal178,688
Check engine light came on got it scanned came up with the code meaning some type of emissions leak in fuel area. Was told it could be the gas cap. When I checked the gas cap it was worn. Bought a new one and in a day and half check engine light went away!
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