Automatic Transmission

DTC Troubleshooting: P2122 (20)

DTC P2122:

Accelerator Pedal Position (APP) Sensor A (Throttle Position Sensor D) Circuit Low Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review General Troubleshooting Information How to Troubleshoot the A/T System.

1. Clear the DTC with the HDS.

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

3. Check for Pending or Confirmed DTCs in the PGM-FI SYSTEM with the HDS.

Is DTC P2122 indicated in the PGM-FI SYSTEM?

YES -

Troubleshoot for DTC P2122 in the PGM-FI SYSTEM P2122.�

NO -

Go to step 4.

4. Check for Pending or Confirmed DTCs in the A/T SYSTEM with the HDS.

Is DTC P2122 indicated in the A/T SYSTEM?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time.�

5. Update the A/T software in the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM Initial Inspection and Diagnostic Overview.

6. Start the engine in P, and let it idle for 2 minutes.

7. Check for Pending or Confirmed DTCs in the A/T SYSTEM with the HDS.

Is DTC P2122 indicated in the A/T SYSTEM?

YES -

If the PCM was updated, substitute a known-good PCM Initial Inspection and Diagnostic Overview, then go to step 6. If the PCM was substituted, go to step 1.

NO -

Go to step 8.

8. Monitor the OBD STATUS for P2122 in the DTCs MENU with the HDS.

Does the HDS indicate PASSED?

YES -

If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 7, go to the indicated DTC's troubleshooting.�

NO -

If the HDS indicates FAILED, check for poor connections or loose terminals between the accelerator pedal position sensor and the PCM. If the PCM was updated, substitute a known-good PCM Initial Inspection and Diagnostic Overview, then go to step 6. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 6.