DTC P0341: Camshaft Position Sensor Circuit: Description

During cranking, the Ignition Control (IC) module monitors the 7X crankshaft position sensor signal. Once the IC module determines spark synchronization, 3X reference signals are sent to PCM. PCM will command all 6 injectors on for one priming shot of fuel in all cylinders. After priming, injectors are left off for the next 6 fuel control reference signals (2 crankshaft revolutions). This allows each cylinder a chance to use the fuel from the priming shot. During this waiting period, a cam pulse would have been received by PCM.

PCM uses the Camshaft Position (CMP) sensor signal pulses to initiate sequential fuel injection and constantly monitors the number of pulses on CMP signal circuit, and compares the number of pulses to the number of 24X reference pulses and the number of 3X reference pulses being received. If PCM receives an incorrect number of pulses on CMP reference circuit, DTC will set and PCM will initiate injector sequence without the CMP signal with a one in 6 chance that injector sequence is correct. Engine will continue to start and run normally, although the misfire diagnostic will be affected if a misfiring condition occurs.