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DTC P0122

id010200804200

DTC P0122 | TP circuit low input
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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
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform the DTC CONFIRMATION PROCEDURE. (See 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. (See INTERMITTENT CONCERN TROUBLESHOOTING.)
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. (See THROTTLE POSITION (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. (See KOEO/KOER SELF-TEST.) • Is the same DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION.)
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE.) • Are any DTCs present? | Yes | Go to the applicable DTC troubleshooting. (See DTC TABLE.)
No | Troubleshooting completed.