DTC Troubleshooting: P2135
DTC P2135: TP Sensor A/B Incorrect Voltage Correlation
Do not insert your fingers into the installed throttle body when you press the engine start/stop button to select the ON mode, or while the vehicle is in the ON mode. If you do, you will seriously injure your fingers if the throttle valve is activated.

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

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

1.
Problem verification:

Problem verification
?1.
Press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


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

  

?4.
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.?
2.
Throttle body operation check:

Throttle body operation check
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the intake air duct from the throttle body.

?3.
Press the engine start/stop button to select the ON mode.

?4.
Clear the DTC with the HDS.


?5.
Visually check the throttle valve operation.

Does the valve temporarily move to its fully closed position?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (PCM, others):

Determine possible failure area (PCM, others)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.

?4.
Check for continuity between test points 1 and 2.
Test condition
OFF 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)


Is there continuity?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.
4.
Shorted wire check (THL1 line to THL2 line):

Shorted wire check (THL1 line to THL2 line)
?1.
Disconnect the following connector.

?2.
Check for continuity between test points 1 and 2.
Test condition
OFF 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)


Is there continuity?

     
YES
     
     
     
Repair a short in the THL1 wire to THL2 wire between PCM connector terminals B31 (THL1 line) and B40 (THL2 line), then do the repair verification.
     
NO
     
     
     
The THL1 and THL2 wires are OK. Replace the throttle body, then do the repair verification.
Repair verification:

?1.
Press the engine start/stop button to select the OFF mode.

?2.
Reconnect all connectors.

?3.
Exit the SCS mode with the HDS.


?4.
Press the engine start/stop button to select the ON mode.

?5.
Reset the PCM with the HDS.


?6.
Do the PCM idle learn procedure.

?7.
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
     
     
     
Check for poor connections or loose terminals at the throttle body and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1.
     
NO
     
     
     
Troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?