DTC P2135

DTC P2135  : TP Sensor A/B Incorrect Voltage Correlation

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Select the ETCS TEST in the INSPECTION MENU with the HDS.

   ETCS TEST

   Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P2135 TP Sensor A/B Incorrect Voltage Correlation

   Is DTC P2135 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 throttle body 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.

2. Determine possible failure area (PCM, others)

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

   - 2. Jump the SCS line with the HDS.

   - 3. Disconnect the following connector.

   PCM connector B (51P) - Refer to: How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the A/T System (2014 2015), or How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016)

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector B (51P): disconnected
   Test circuit	THL1, THL2
   Test point 1	PCM connector B (51P) No. 31 (RED)
   Test point 2	PCM connector B (51P) No. 40 (TAN)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Go to step 3.

   NO 

   Update the PCM if it does not have the latest software, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2014 2015), or PCM Removal and Installation (2016) .

3. Shorted wire check (THL1 line to THL2 line)

   -1. Disconnect the following connector.

   Throttle body 6P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector B (51P): disconnected
   	Throttle body 6P connector: disconnected
   Test circuit	THL1, THL2
   Test point 1	PCM connector B (51P) No. 31 (RED)
   Test point 2	PCM connector B (51P) No. 40 (TAN)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Repair a short in the THL1 wire to the THL2 wire between PCM connector terminals B31 (THL1 line) and B40 (THL2 line).

   NO 

   The THL1 and THL2 wires are OK. Replace the throttle body .