P0341

DTC P0341 CMP Sensor Circuit Performance




Circuit Description
The Camshaft Position sensor is a three wire Hall effect sensor is used to determine when cylinder #1 is on its compression stroke. The CMP sensor has an ignition feed circuit, a ground circuit and a signal circuit. The signal is detected at the VCM on the signal circuit. This signal is used by the VCM to coordinate fuel control, ignition controlled spark timing and for use in some engine diagnostics.

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 is running.

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

Action Taken When the DTC Sets
The VCM illuminates the MIL (Malfunction Indicator Lamp) after 2 consecutive test failures

Conditions for Clearing the MIL/DTC
- The VCM 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 startup 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

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

If a repair is necessary, then refer to Wiring Repairs or Connector Repairs.

Steps 1 - 4:

Steps 5 - 8:

Test Description
The step number below refers to the step number in the diagnostic table.
2. If any other DTCs are set, go there first.
3. This step checks for an electromagnetic interference caused by improper harness routing.