DTC Troubleshooting

DTC P2128: APP Sensor B (TP Sensor E) Circuit High Voltage

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

1. Turn the ignition switch to ON (II).
2. Check APP SENSOR B in the DATA LIST with the HDS.

Is there about 4.9 V or more?

YES - Go to step 3.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at APP sensor Band the ECM/PCM.

3. Turn the ignition switch to LOCK (0).
4. Disconnect the APP sensor 6P connector.
5. Turn the ignition switch to ON (II).
6. Measure voltage between APP sensor 6P connector terminals No. 5 and No. 6.






Is there about 5 V?

YES - Go to step 12.

NO - Go to step 7.

7. Turn the ignition switch to LOCK (0).
8. Jump the SCS line with the HDS.
9. Disconnect ECM/PCM connector A (49P).
10. Connect APP sensor 6P connector terminal No. 5 to body ground with a jumper wire.






11. Check for continuity between ECM/PCM connector terminal A35 and body ground.






Is there continuity?

YES - Go to step 19.

NO - Repair open in the wire between the ECM/PCM (A35) and APP sensor B, then go to step 14.

12. Turn the ignition switch to LOCK (0).
13. Replace the accelerator pedal module.
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure. Programming and Relearning
18. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2128 indicated?

YES - Check for poor connections or loose terminals at APP sensor B and the ECM/PCM, then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

19. Reconnect all connectors.
20. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.
21. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2128 indicated?

YES - Check for poor connections or loose terminals at APP sensor B and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then recheck. 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. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.