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
RepairPal Verified
Average mileage: 107,757 (65,000–189,000)
Engine affected: 3.5L V6
4 model years affected: 2002, 2003, 2004, 2005
22 people reported this problem
Viewing 1 - 8 of 8 problem details
I need to know where the egr valve is located on the the car.
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
Rough idle but ok if I put it in neutral. Haven't fixed it yet.
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.
Hard to pump gas. Since I bought it new. Every time I take the cap off engine light comes on for 10 years
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