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Home >> Infiniti >> 2024 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> Engine (ECM) >> DTC P0454: EVAP System Pressure Sensor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR 
    1. Disconnect EVAP control system pressure sensor harness connector.
    2. Check that water is not inside connectors.

    Is the inspection result normal?

    YES>>

    GO TO 2.

    NO>>

    Repair or replace harness connector.

  2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch ON.
    2. Check the voltage between EVAP control system pressure sensor harness connector and ground.
      EVAP control system pressure sensor Ground Voltage (V)
      Connector Terminal
      C17 3 Ground Approx. 5 V

    Is the inspection result normal?

    YES>>

    GO TO 4.

    NO>>

    GO TO 3.

  3. CHECK SENSOR POWER SUPPLY 3 CIRCUIT 

    Perform Refer to Diagnosis Procedure . Is the inspection result normal?

    YES>>

    Perform the trouble diagnosis for power supply circuit. Refer to Diagnosis Procedure .

    NO>>

    Repair or replace error-detected parts.

  4. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 

    Refer to Component Inspection . Is the inspection result normal?

    YES>>

    GO TO 5.

    NO>>

    Replace EVAP control system pressure sensor.

  5. CHECK INTERMITTENT INCIDENT 

    Refer to Inspection .

    >>

    INSPECTION END