During cranking, the ignition control (IC) module monitors the 7X crankshaft position (CKP) sensor signal. Once the engine starts the IC module determines spark synchronization, by the camshaft position (CMP) sensor pulses. The powertrain control module (PCM) constantly monitors the number of pulses on the CMP signal circuit and compares the number of CMP pulses to the number of 24X reference pulses and the number of 3X reference pulses being received. If the PCM receives an incorrect number of pulses on the CMP signal circuit, DTC P0341 will set.
CONDITIONS FOR RUNNING THE DTC
The engine is running.
CONDITIONS FOR SETTING THE DTC
The camshaft position (CMP) sensor reference pulse is not detected during every engine revolution.
ACTION TAKEN WHEN THE DTC SETS
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.
The following conditions may cause this DTC to set:
Incorrect harness routing near secondary ignition components
Ignition coil arcing to wiring harness or IC module. Inspect the ignition coils for cracks, for carbon tracking, or for other signs of damage.
Camshaft reluctor wheel damage
The sensor coming in contact with the reluctor wheel
Foreign material passing between the sensor and the reluctor wheel
Excessive camshaft end-play
If the condition is intermittent, refer to Intermittent Conditions. See: Powertrain Management Computers and Control Systems Testing and Inspection Initial Inspection and Diagnostic Overview Diagnostic Strategies
Saturday, December 1st, 2012 AT 10:55 PM