P0341

Circuit Description
The Camshaft Position (CMP) sensor is a sensor designed to detect changes in a magnetic field. The Control Module (PCM/VCM) supplies the CMP sensor with signal and ground circuits. Ignition voltage is supplied to the CMP sensor by an independent circuit. The CMP sensor produces a magnetic field whenever the ignition is ON. The CMP sensor is mounted near a reluctor wheel that is attached to the distributor shaft. When the distributor shaft rotates (the engine is cranking or running) the reluctor wheel changes the magnetic field. The CMP sensor converts each change in the magnetic field into a "pulse." The number of teeth on the reluctor wheel determines how many pulses the CMP sensor detects per camshaft rotation. The Control Module uses the CMP sensor signal in order to calculate the correct timing for sequential fuel injection.

If the VCM detects the CMP signal is not synchronized with the CKP sensor signal, this DTC will be set.

Conditions for Running the DTC
The engine running.

Conditions for Setting the DTC
The CMP sensor reference pulse is not detected at the correct time interval once every 2 crankshaft revolutions.

Action Taken When the DTC Sets
^ The Control Module illuminates the Malfunction Indicator Lamp (MIL) if a failure is detected during 2 consecutive key cycles.
^ The Control Module will set the DTC and records the operating conditions at the time the diagnostic fails. The Control Module stores the failure information in the scan tools Freeze Frame and/or the Failure Records.

Conditions for Clearing the MIL/DTC
^ The Control Module turns OFF the MIL after 3 consecutive drive trips when the test has Run and Passed.
^ A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles (coolant temperature has risen 22°C (40°F) from the start-up coolant temperature and the Engine Coolant Temperature is more than 70°C (158°F) during the same ignition cycle).
^ Use the scan tool Clear Information function.

Diagnostic Aids
Refer to Symptoms.
An intermittent may be caused by any of the following conditions:
^ A poor connection
^ Rubbed through wire insulation
^ A broken wire inside the insulation Symptom Related Diagnostic Procedures

Thoroughly check any circuitry that is suspected of causing the intermittent complaint. Refer to Intermittents and Poor Connections Diagnosis.

Test Description
The step number below refers to the step number in the diagnostic table.
2. Complete diagnosing all other DTCs before performing this diagnostic.
3. This step checks for an electromagnetic interference caused by improper harness routing.