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DTC P0122 [L3]

BME010200100234

DTC P0122 | TP circuit low input
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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
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform DTC CONFIRMATION PROCEDURE. (See DTC CONFIRMATION PROCEDURE [L3].) • Is the same DTC present? | Yes | Go to the next step.
No | Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3].)
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. (See THROTTLE POSITION (TP) SENSOR INSPECTION [L3].) • 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. (See KOEO/KOER SELF-TEST PROCEDURE [L3].)
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L3].)
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3].)
No | Troubleshooting completed.