DTC Troubleshooting: P0344 (57-8)

DTC P0344:  CMP Sensor Intermittent Interruption

1.Turn the ignition switch ON (II).

2.Clear the DTC with the HDS.

3.Start the engine. If engine does not start, keep cranking 10 seconds.

4.Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0344 indicated?


YES - Go to 5.


NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the CMP sensor and the ECM.n


5.Turn the ignition switch OFF.

6.Check for poor or loose connections and terminals at the following:
  • CMP sensor
  • ECM
  • Engine ground
  • Body ground

Are the connections and terminals OK?


YES - Go to 7.


NO - Repair the connectors or terminals, then go to 11.


7.Check the camshaft timing.

Is the camshaft timing OK?


YES - Go to 8.


NO - Reset the camshaft timing, then go to 11.

8.Check for damage on the CMP sensor pulse plate.

Is the pulse plate damaged?


YES - Replace the CMP sensor pulse plate, then go to 11.


NO - Go to 8.


9.Turn the ignition switch OFF.

10.Replace the CMP sensor.

11.Turn the ignition switch ON (II).

12.Reset the ECM with the HDS.

13.Start the engine, and let it idle 10 seconds.

14.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P0344 is indicated, check for poor connections or loose terminals at the CMP sensor and the ECM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - Troubleshooting is complete.n