Rough Idle Due to EGR Valve Sticking Open on Cadillac 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: 93,545 (93,545–93,545)
3 model years affected: 2006, 2007, 2008
4 people reported this problem
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problem details
2007 Cadillac DTS 93,545 mi,
The issue is when at traffic light in therror rear of the car there three knocks as if the car is trayin to stall.