Rough Idle Due to EGR Valve Sticking Open on Cadillac DeVille DTS

The EGR valve may stick open, causing a rough idle and/or the Check Engine Light to illuminate.

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Average mileage: 113,000 (65,000–161,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
8 people reported this problem
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