DTC Troubleshooting

DTC Troubleshooting: P0344

DTC P0344: CMP Sensor A Circuit Intermittent Interruption

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Reading and Clearing Diagnostic Trouble Codes

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Start the engine, and let it idle for 10 seconds.

4. Check the CMP A NOISE in the DATA LIST with the HDS.

Are 0 counts indicated?
YES - Go to step 7.

NO - Go to step 5.


5. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
- ENGINE SPEED

- VSS

6. Check the CMP A NOISE in the DATA LIST with the HDS.

Are 0 counts indicated?
YES - Go to step 7.

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


7. Check for poor connections or loose terminals at these locations:
- CMP sensor A

- ECM

- Engine ground

- Body ground

Are the connections and terminals OK?
YES - Go to step 8.

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


8. Check for damage on the CMP pulse plate A. CMP Pulse Plate A Replacement

Is the pulse plate damaged?
YES - Replace the CMP pulse plate A, CMP Pulse Plate A Replacement then go to step 11.

NO - Go to step 9.


9. Turn the ignition switch to LOCK (0).

10. Replace CMP sensor A. CMP Sensor A Replacement

11. Turn the ignition switch to ON (II).

12. Reset the ECM with the HDS.

13. Do the ECM idle learn procedure. ECM/PCM Idle Learn Procedure

14. Start the engine, and let it idle for 10 seconds.

15. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0344 indicated?
YES - Check for poor connections or loose terminals at CMP sensor A and the ECM, then go to step 1.

NO - Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.