DTC P0122 [L3]

BME010200100234

DTC P0122

TP circuit low input

DETECTION CONDITION

• If the PCM detects the TP sensor voltage at PCM terminal 2A is below 0.1 V while the engine is running, the PCM determines that the TP circuit has a malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction conditions in first drive cycles.
• PENDING CODE is available if 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 between TP sensor terminal B and PCM terminal 2A
• Short to ground circuit between TP sensor terminal B and PCM terminal 2A
• Open circuit between TP sensor terminal C and PCM terminal 2K

Diagnostic procedure

STEP

INSPECTION

ACTION

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
• Is the same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
2
CLASSIFY TP SENSOR OR HARNESS MALFUNCTION
• Connect the WDS or equivalent to the DLC-2.
• Access 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 4.
3
INSPECT TP SENSOR CIRCUIT FOR OPEN
• Inspect the TP sensor.
• Is the TP sensor normal?
Yes
Inspect for poor TP sensor connector terminal C connection.
Repair or replace as necessary, then go to Step 7.
No
Replace the TP sensor, then go to Step 7.
4
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 2K (wiring harness-side).
• Is the voltage within 4.5- 5.5 V?
Yes
Go to the next step.
No
Repair or replace open circuit between TP sensor connector terminal C and PCM connector terminal 2K (wiring harness-side).
Then, then go to Step 7.
5
VERIFY TP SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between TP sensor terminal B (wiring harness-side) and PCM terminal 2A.
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 7.
6
VERIFY TP SIGNAL CIRCUIT FOR SHORT TO GROUND
• Inspect for continuity between TP sensor terminal B (wiring 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.
• Perform KOEO/KOER self-test.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.