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I have a 2005 Cayenne S and the CEL came on. It came on when I was accelerating from a stop, and in genreal, the car has developed a rough idle. After bringing it into the dealer they said it was a camshaft sensor error code. After further diogonosis they said the problem was with the camshaft actuator. I didn't talk to the service tech, so the service contact could only explain so much. They want to replace the hydrolic valve 948-105-303-08 and the oil screen 997-105-701-00 (in addition to the valve cover gaskets and an oil change). My question is what is this valve, is it the camshaft actuator solenoid? Has anyone else seen something similar? They want something like $900 to do the repair.

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I think it's this attached part, but I can't tell if it's serviceable or if the valve covers need to come off. Based on the fact that they want to replace the valve cover gaskets, I'm guessing it's not a quick job. I'm just trying to figure out how easy this job is to do. Based on the fact it has developed a rough idle, I'm guessing their diagnosis is correct. Was hoping somone could explain the replacement?

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Yes the valve cover has to be removed. This is the oil control valve for the actuation of the timing chain that links the exhaust and intake camshafts. Any chance you could post the fault codes? The odd time a cylinder misfire will set a camshaft deviation code.

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