Check Engine Light Due to Gas Cap Issue on Buick Enclave

A Loose or worn gas cap may cause Check Engine Light to illuminate.

RepairPal Verified
Average mileage: 96,766 (52,000–157,397)
3 model years affected: 2008, 2009, 2010
14 people reported this problem
4 people shared problem details
2008 Buick Enclave69,574
check engine light has been on 3 days - OnStar says it's a loose gas cap but I've tightened it 3 times and the light is still on. 2nd call to OnStar said "Car has to be driven normally for 7 times and the light will go out"??? Why 7 times?
2008 Buick Enclave146,000
check engine light came on today, can you tell me what might be the problem?
engine light is on and we are trying to solve the problem. I will look into the gas cap as well.
2008 Buick Enclave140,000
No more topping off the tank! Replaced gas cap!
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