Ken n;
The fault code is the camshaft's position sensor "circuit" has a problem.
At start up no camshaft position (phase) signal has been detected and decoded for more then a predetermined period of time at the Engine Control Manager (ECM).
The camshaft position sensor signal is not been detected for a predetermined time period during engine running. (during crankshaft position signal input)
The camshaft's position sensor signal's waveform isn't detected for a predetermined period of time during engine running. (crankshaft position sensor signal is detected at the ECM)