DTC Troubleshooting

DTC Troubleshooting: P2138, P2138

DTC P2138:

APP Sensor A/B (TP Sensor D/E) Incorrect Voltage Correlation

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Clear the DTC with HDS.

3. Press the accelerator pedal to the floor.

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

Is DTC P2138 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the APP sensor and the ECM/PCM.

5. Check APP SENSOR A and APP SENSOR B in the DATA LIST with the HDS.

Are they the same voltage?

YES -

Go to step 6.

NO -

Go to step 12.

6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

7. Jump the SCS line with the HDS.

8. Disconnect ECM/PCM connector A (49P).

9. Check for continuity between ECM/PCM connector terminals A18 and A19.





Is there continuity?

YES -

Go to step 10.

NO -

Go to step 22.

10. Disconnect the APP sensor 6P connector.

11. Check for continuity between ECM/PCM connector terminals A18 and A19.





Is there continuity?

YES -

Repair short in the wires between ECM/PCM connector terminals A18 (APSA line) and A19 (APSB line), then go to step 14.

NO -

Go to step 13.

12. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

13. Replace the accelerator pedal module Service and Repair.

14. Reconnect all connectors.

15. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

16. Reset the ECM/PCM with the HDS.

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

18. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

19. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

20. Press the accelerator pedal to the floor.

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

Is DTC P2138 indicated?

YES -

Check for poor connections or loose terminals at the APP sensor and the ECM/PCM, 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.

22. Reconnect all connectors.

23. Update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/PCM.

24. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

25. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

26. Press the accelerator pedal to the floor.

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

Is DTC P2138 indicated?

YES -

Check for poor connections or loose terminals at the APP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to step 24. If the ECM/PCM was substituted, go to step 1.

NO -

If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.