Check Engine Light Due to Gas Cap Issue on Cadillac DTS

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 83,153 (54,000–131,577)
5 model years affected: 2006, 2007, 2008, 2009, more2010
14 people reported this problem
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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
engine stays on