DTC P0122

id010200804200

DTC P0122

TP circuit low input

DETECTION CONDITION

• If the PCM detects that the TP sensor voltage at PCM terminal 2AA is less than 0.10 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).
• The MIL illuminates if PCM detects the above malfunction conditions in the first drive cycle.
• The PENDING CODE is available if the PCM detects the above malfunction condition.
• The FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• TP sensor malfunction
• Connector or terminal malfunction
• Short to ground circuit between TP sensor terminal C and PCM terminal 2AA
• Open in circuit between TP sensor terminal A and PCM terminal 2W
• Short each wiring harness TP signal circuit and TP ground circuit

Diagnostic procedure

STEP

INSPECTION

ACTION

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform the DTC CONFIRMATION PROCEDURE.
• Is the same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists. Go to the INTERMITTENT CONCERN TROUBLESHOOTING procedure.
2
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 (wiring harness-side) A and C.
• Is the voltage 4.9 V or more?
Yes
Go to the next step.
No
Go to step 4.
3
INSPECT TP SENSOR
• Perform the TP sensor inspection.
• Is the TP sensor normal?
Yes
Inspect for improper the 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
• Turn the ignition switch to the ON position (Engine off).
• Inspect the voltage at TP sensor terminal A (wiring harness-side).
• Is the voltage within 4.5- 5.5 V?
Yes
Go to the next step.
No
Repair or replace for an open circuit between the TP sensor connector terminal A (wiring harness-side) and the PCM connector terminal 2W (wiring harness-side).
Then go to Step 7.
5
VERIFY TP SIGNAL CIRCUIT FOR SHORT TO GROUND
• Inspect continuity between TP sensor terminal C (wiring harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace the suspected wiring harness, then go to Step 7.
No
Go to the next step.
6
INSPECT TP CIRCUIT FOR SHORT TO WIRING HARNESSES
• Inspect the continuity between TP sensor terminal (wiring harness-side) B and C.
• Is there continuity?
Yes
Repair or replace the wiring harness for short, then go to the next step.
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 the 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 the "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to the applicable DTC troubleshooting.
(See DTC TABLE.)
No
Troubleshooting completed.