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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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.