Car Problem Reports

Buick LaCrosse Check Engine Light Due to Gas Cap Issue

Buick LaCrosse Problem
32 Reports
Me Too

Model Years Affected: 2005, 2006, 2007, 2008, 2009, 2010, 2012

Average Mileage: 61,633 mi (10,200 mi - 110,000 mi)


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

  • Visitor, , 37,000 mi

    Check engine light
    Leak in pressurized system
    Gas inlet defective
    Replaced $77 at dealer

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  •  Rookie

    Check engine light stayed on. Remote diagnostic (Onstar)indicated that problem was with the gas cap. Took car to dealer, told them and they replaced the cap. Problem resolved.

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  • Visitor, , 22,098 mi

    gas cap light cap looks ok then engine check light guess I should of bought a donkey

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  • Visitor, , 80,000 mi

    Check gas cap light keeps coming on intermittently and now check engine light on. Replaced gas cap
    and okay for awhile. Both engine light and check gas cap light went off. Now, back on again.
    First check gas cap (which I did) and now engine light.

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  • Visitor, , 52,000 mi

    I have selected "me too" to 3 other common problems with the Lacrosse. I contacted buick for assistance on repairs and they said Garber Buick in Saginaw Michigan would only agree to $50 assistance on a $443 repair bill. How sad! But they had no problem taking bail out assistance from my tax paying money!!!!!!!!!!!!

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  • Visitor, , 89,000 mi

    Always low feul gas cap or chek gas cap

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  •  Enthusiast

    We had this issue too. Mechanic found the problem.

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  •  Rookie

    check gas cap would come on if you did not clear it then check engine light comes on

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  • Visitor, , 27,213 mi

    Check engine light on first time at 18,000 miles this was due to a bad wire from gas tank to sensor fixed light went out at 27,000 miles it lit up again this time they had to drop the gas tank and replace the sensor.Will see if this comes back.

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  • Visitor, , 110,000 mi

    Check engine light came on at approx. 35,000 miles. Got gas cap replaced. Didn't have any more problems until approx. 110,000 miles. Have retightened the cap several times. Light went out the first few times. Now stays on. Will have to replace the cap again.

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