DTC P2138 (6-Speed A/T, 16-18 9-Speed A/T)

DTC P2138  : APP Sensor A/B (TP Sensor D/E) Incorrect Voltage Correlation

NOTE:  Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems .

DTC (PGM-FI)

1. Problem verification

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Press the accelerator pedal to the floor.

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

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P2138 APP Sensor A/B (TP Sensor D/E) Incorrect Voltage Correlation

   Is DTC P2138 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

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

   If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems .

2. Determine possible failure area (short in AP lines, others)

   - 1. Check the parameter (s) below with the HDS.

   Signal	Current conditions
   	Values	Unit
   APP SENSOR A
   APP SENSOR B

   Are they the same voltage?

   YES 

   Go to step 3.

   NO 

   Replace the APP sensor .

3. Determine possible failure area (PCM, others)

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Jump the SCS line with the HDS, and wait more than 1 minute.

   - 3. Disconnect the following connector.

   PCM connector A (51P)

   - 4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   Test point 1	PCM connector A (51P) No. 45 - Refer to: PCM Connector for Inputs and Outputs (16-18 9-Speed A/T), or PCM Connector for Inputs and Outputs (16-20 6-Speed A/T)
   Test point 2	PCM connector A (51P) No. 46 - Refer to: PCM Connector for Inputs and Outputs (16-18 9-Speed A/T), or PCM Connector for Inputs and Outputs (16-20 6-Speed A/T)

   Is there continuity?

   YES 

   Go to step 4.

   NO 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM - Refer to:

   PCM Removal and Installation (6-Speed A/T, 16-18 9-Speed A/T) .

4. Shorted wire check (AP1 line to AP2 line)

   - 1. Disconnect the following connector.

   APP sensor 6P connector

   - 2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   	APP sensor 6P connector: disconnected
   Test point 1	PCM connector A (51P) No. 45 - Refer to: PCM Connector for Inputs and Outputs (16-20 6-Speed A/T), or PCM Connector for Inputs and Outputs (16-18 9-Speed A/T)
   Test point 2	PCM connector A (51P) No. 46 - Refer to: PCM Connector for Inputs and Outputs (16-20 6-Speed A/T), or PCM Connector for Inputs and Outputs (16-18 9-Speed A/T)

   Is there continuity?

   YES 

   Repair a short in the AP1 wire to the AP2 wire between PCM connector terminals A45 (AP1 line) and A46 (AP2 line).

   NO 

   The AP1 and AP2 wires are OK. Replace the APP sensor .