DTC P0452:00 [MZI-3.7]

id0102d2300800

DTC P0452:00 | Fuel tank pressure sensor low input
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DETECTION CONDITION | • The PCM monitors the evaporative emission (EVAP) control system fuel tank pressure sensor input signal to the PCM. The test fails when the signal average drops below a minimum allowable calibrated parameter.
POSSIBLE CAUSE | • Connector or terminal malfunction • Short to ground between fuel tank pressure sensor terminal C and PCM terminal 1I • Fuel tank pressure sensor signal circuit and ground circuit for short each other • Fuel tank pressure sensor malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the 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 FUEL TANK PRESSURE SENSOR CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the fuel tank pressure sensor 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 7.
No | Go to the next step.
4 | VERIFY FUEL TANK PRESSURE SIGNAL CIRCUIT FOR SHORT TO GROUND • Fuel tank pressure sensor connector is disconnected. • Turn the ignition switch off. • Inspect for continuity between fuel tank pressure sensor terminal C (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace suspected part, then go to Step 7.
No | Go to the next step.
5 | INSPECT FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT EACH OTHER • Fuel tank pressure sensor connector is disconnected. • Turn the ignition switch off. • Disconnect the PCM connector. • Measure resistance between PCM terminal 1I (wiring harness-side) and PCM terminal 1AT (wiring harness-side) • Is the resistance more than 10 kilohms? | Yes | Go to the next step.
No | Repair or replace suspected part, then go to Step 7.
6 | INSPECT FUEL TANK PRESSURE SENSOR • Perform the fuel tank pressure sensor inspection. (See FUEL TANK PRESSURE SENSOR INSPECTION [MZI-3.7].) • Is the fuel tank pressure sensor normal? | Yes | Go to the next step.
No | Replace the evaporative hose component, then go to the next step. (See FUEL TANK REMOVAL/INSTALLATION [MZI-3.7].)
7 | VERIFY TROUBLESHOOTING OF DTC P0452:00 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the M-MDS. • Start the engine and warm it up completely. • 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.
8 | 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.