( TF09EABK72100092138FAAT00 )
DTC Troubleshooting: P2138 (37)
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.
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with HDS.
  1. Press the accelerator pedal to the floor.
  1. Check for Temporary DTCs or 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.■
  1. 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 .
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM/PCM connector A (49P).
  1. Check for continuity between ECM/PCM connector terminals A18 and A19.
Is there continuity?
YES -
Go to Step 10 .
NO -
Go to Step 22 .
  1. Disconnect the APP sensor 6P connector.
  1. 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 .
  1. Turn the ignition switch to LOCK (0).
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Reset the ECM/PCM with the HDS.
  1. Turn the ignition switch to LOCK (0).
  1. Turn the ignition switch to ON (II).
  1. Press the accelerator pedal to the floor.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2138 indicated?
YES -
Check for poor connections or loose terminals at APP sensor A/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 DTC's troubleshooting.■
  1. Reconnect all connectors.
  1. Turn the ignition switch to LOCK (0).
  1. Turn the ignition switch to ON (II).
  1. Press the accelerator pedal to the floor.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2138 indicated?
YES -
Check for poor connections or loose terminals at APP sensor A/B and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to Step 23 . 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 DTC's troubleshooting.■