With DTCs, or "trouble codes" a common perception is that they always point to a faulty component (part). Not necessarily so; they are really indicating only that the voltage on that electrical circuit is "too high" or "too low". Have the electrical circuit for the cam sensor checked back to the computer for open, shorted or grounded wiring. You should also scope the square-wave pattern of the cam sensor if necessary and compare it with known good examples in a repair database.
Jim O'Neill - Chino Autotech Inc., Auto Club SoCal AAR