DTC P0122:00 [MZI-3.7]

id0102d2701800

DTC P0122:00 | TP sensor No.1 circuit low input
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DETECTION CONDITION | • The TP sensor No.1 circuit was flagged as a concern by the PCM indicating a low voltage or open circuit.
POSSIBLE CAUSE | • Connector or terminal malfunction • Short to ground circuit between throttle body terminal F and PCM terminal 2AN • Open circuit between throttle body terminal F and PCM terminal 2AN • Open circuit between throttle body terminal E and PCM terminal 2Z • TP sensor No.1 malfunction

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 FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT TP SENSOR CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the throttle body connector. • Inspect for poor connection (such as damaged/ pulled-out pins, corrosion). • Are there any malfunction? | Yes | Repair or replace suspected part, then go to Step 9.
No | Go to the next step.
4 | INSPECT TP SENSOR CIRCUIT FOR SHORT TO GROUND • Throttle body connector is disconnected. • Turn the ignition switch to the ON position (Engine off). • Inspect for continuity between throttle body terminal F (wiring harness-side) and body ground • Is there continuity? | Yes | Repair or replace suspected part, then go to Step 9.
No | Go to the next step.
5 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/ pulled-out pins, corrosion). • Are there any malfunction? | Yes | Repair or replace suspected part, then go to Step 9.
No | Go to the next step.
6 | INSPECT TP SIGNAL CIRCUIT FOR OPEN CIRCUIT • Throttle body and PCM connectors are disconnected. • Inspect for continuity between throttle body connector terminal F (wiring harness-side) and PCM terminal 2AN (wiring harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace suspected part, then go to Step 9.
7 | INSPECT TP GROUND CIRCUIT FOR OPEN CIRCUIT • Throttle body and PCM connectors are disconnected. • Turn the ignition switch off. • Verify the continuity between TP sensor terminal E (wiring harness-side) and PCM terminal 2Z (wiring harness-side). • Is the continuity? | Yes | Go to the next step.
No | Repair or replace suspected part, then go to Step 9.
8 | INSPECT TP SENSOR NO.1 • Inspect the TP sensor No.1. (See THROTTLE POSITION (TP) SENSOR INSPECTION [MZI-3.7].) • Is there any malfunction? | Yes | Replace the throttle body, then go to the next step.
No | Go to the next step.
9 | VERIFY TROUBLESHOOTING OF DTC P0122:00 HAS BEEN COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Perform the KOEO or KOER self-test. (See KOEO/KOER SELF TEST [MZI-3.7].) • Is same DTC present? | Yes | Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZI-3.7].) Go to the next step.
No | Go to the next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
No | Troubleshooting completed.