For info on it's location and how it can cause sensor faults, check out this excellent info by halcyonn:
ECU and wire harness corrosion
I have been having all kinds of issues with my ATS 2.0T with check engine lights and things not running right. One of the lights I got was for the cam shaft position sensor. I took it to a mechanic and he determined the sensor was bad because the computer was saying it was giving off low...
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