Rough Idle Due to Faulty EGR Switching Valve on Hyundai XG350

Problem Description and Possible Solution

A defective exhaust gas recirculation (EGR) switching valve may cause an intermittent rough or unstable idle engine.

Problem Data
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Average mileage: 108,668 (65,000–189,000)
Engine affected: 3.5L V6
4 model years affected: 2002, 2003, 2004, 2005
21 people reported this problem
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Viewing 1 - 7 of 7 comments
I need to know where the egr valve is located on the the car.
Rough idle but ok if I put it in neutral. Haven't fixed it yet.
when car is in park the car vibrates and the rpm guage wont go down passed 2 on the gauge car vibrates until car is turned off
EGR valve welded to threads. Finally removed new installed and same problem. Back in shop.
Rough idle. Took it to repair. Tech said evr valve. After service, it still idkes rough. Took it back tech said nothing wrong car over 10 yes old is not going to run like new.
Not fixed yet, but same problem occurs intermittently
rough idle. has not been fixed. diagnosed as possible egr swich issue. dealer that sold me the car is supposed to be repairing it and also all required maintenance. I am waiting 3 weeks