DTC P0452 [MZI-3.7]

id0102d2873700

DTC P0452

Fuel tank pressure sensor low input
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
•  Fuel tank pressure sensor malfunction
•  Connector or terminal malfunction
•  Short to ground between fuel tank pressure sensor terminal A and PCM terminal 1AB
•  Fuel tank pressure sensor signal circuit and ground circuit for short each other

Diagnostic procedure

STEP

INSPECTION

ACTION
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 TANKE 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
•  Turn the ignition switch off.
•  Inspect for continuity between fuel tank pressure sensor terminal A (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 TANKE PRESSURE SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT EACH OTHER
•  Turn the ignition switch off.
•  Disconnect the fuel tank pressure sensor and PCM connector.
•  Measure resistance between PCM terminal 1AB (wiring harness-side) and PCM terminal 1AL (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 TANKE PRESSURE SENSOR
•  Perform the fuel tank pressure sensor inspection.
•  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 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
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZI-3.7].)
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 inspection.
(See DTC TABLE [MZI-3.7].)
No
Troubleshooting completed.