Check Engine Light Due to Gas Cap Issue on Cadillac DTS

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

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Average mileage: 73,469 (54,000–99,345)
5 model years affected: 2006, 2007, 2008, 2009, more2010
12 people reported this problem
2 people shared problem details
2009 Cadillac DTS54,000
engine stays on
We noticed that when putting gas into the car on our last fill-up, it kept shutting off the auto-stop on the filler handle, it had never done that before in the two years we have owned the car, then the next time we drove it the "check engine light" illuminated. LRW
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