Car Problem Reports

Cadillac Eldorado Check Engine Light Due to Gas Cap Issue

Cadillac Eldorado Problem
9 Reports
Me Too

Model Years Affected: 1996, 1997, 1998, 1999, 2000, 2001, 2002

Average Mileage: 70,751 mi (60,000 mi - 81,502 mi)


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

  • Visitor, , 60,000 mi

    The onboard diagnostic system gave me a check radiator cap notice. I check the cap and it was screwed on firmly. Apparently the cap is getting worn and it intermittently compromises the "Closed system". I have not had to replace the cap yet and the light has not come on in quite awhile. Until it comes on and stays on, I'll keep the old cap.

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  • Visitor, , 81,502 mi

    Engine code is diagnosed as a gas cap problem several previous times. However, the last 2 times this has happen a new gas cap from the dealer was installed. Not sure what to do next to fix the issue!

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