My buddy owns a cayenne s and is getting cel intermittently. I have duremtric and scanned 3 codes, C1F01, along with misfire code P2C01, P2D01. Car has ruff idle. I have a 996tt, and not familiar with dif codes, any ideas or help greatly appreciated. C1F01 is cam position sensor, is it on it's way out? Car has 69k miles.
Tia