Check Engine Light Due to Gas Cap Issue on Cadillac DeVille DTS

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

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Average mileage: 87,166 (45,000–150,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
12 people reported this problem
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Viewing 1 - 4 of 4 problem details
2005 Cadillac DeVille DTS 45,000 mi,
Every once in awhile the check engine light has to be cleared due to a gas cap issue. I have not replaced the gas cap.
2003 Cadillac DeVille DTS 88,000 mi,
Just purchased this car for cheap money.....but it's gorgeous. Haven't put 300 miles on it and now I'm replacing the Torque Converter, & the check gas cap light keeps coming on. Hope I didn't make a big mistake by buying this car ?? The Griz
2003 Cadillac DeVille DTS 150,000 mi,
I am told the code refers to filling up gas tank wile engine is running. I have never done that