DTC P0122 [LF]

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DTC P0122 [LF]

B3E010201084W16

DTC P0122 | TP sensor circuit low input
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DETECTION CONDITION

• If the PCM detects the TP sensor voltage at PCM terminal 2I is below 0.1 V while the engine running to on, the PCM determines that the TP circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction conditions in first drive cycles.
• PENDING CODE is available if the PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE | • TP sensor malfunction • Connector or terminal malfunction • Open circuit in wiring harness between TP sensor terminal B and PCM terminal 2I • Short to ground in wiring harness between TP sensor terminal B and PCM terminal 2I • Open circuit in wiring harness between TP sensor terminal C and PCM terminal 2W

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available? | Yes | Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.

3

CLASSIFY TP SENSOR OR WIRING HARNESS MALFUNCTION
• Connect the WDS or equivalent.
• Access the TP PID.
• Disconnect the TP sensor connector.
• Connect a jumper wire between TP sensor terminals B and C (wiring harness-side).
• Is the voltage above 4.9 V?

Yes

Go to the next step.

No | Go to step 5.
4 | INSPECT TP SENSOR • Perform TP sensor inspection. (See THROTTLE POSITION (TP) SENSOR INSPECTION [LF].) • Is TP sensor normal? | Yes | Inspect TP sensor terminal C for poor connection. Repair or replace if necessary, then go to Step 7.
No | Replace the TP sensor, then go to Step 7.

5

INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT TP SENSOR CONNECTOR

  Note

  • If DTC P0107 and P2228 are also retrieved with P0122, go to CONSTANT VOLTAGE troubleshooting procedure.

• Turn the ignition switch to the ON position (Engine off).
• Inspect the voltage at TP sensor terminal C (wiring harness-side).
• Is the voltage within 4.5- 5.5 V?

Yes

Go to the next step.

No | Repair or replace open circuit in wiring harness between TP sensor connector terminal C and PCM terminal 2W (wiring harness-side). Then, go to Step 7.
6 | VERIFY TP SIGNAL CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between TP sensor terminal B (harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness, then go to Step 7.
No | Go to the next step.
7 | VERIFY TROUBLESHOOTING OF DTC P0122 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Is the same DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [LF].)
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [LF].) • Are any DTC present? | Yes | Go to the applicable DTC troubleshooting. (See DTC TABLE [LF].)
No | Troubleshooting completed.