HI all

We have a P3008 fault code "cam position sensor not a plausible signal". Code appeared after head gasket replacement. If the sensor is unplugged the car will run, if its plugged in it wont start. Timing was pinned and we've double checked it. Replaced sensor still no difference. We've check power & ground to the sensor & scoped the signal wire all ok.

Any ideas would be much appreciated.

Thanks.