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Home >> Infiniti >> 2019 >> Q60 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (6 Of 13) >> DTC/Circuit Diagnosis >> DTC P0451: EVAP Control System Pressure Sensor >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK HOSE AND PIPING 
    1. Turn ignition switch OFF.
    2. Check the following.
      • Blockage, crush, or damage in the hose and the piping of EVAP purge line between fuel tank and intake manifold.
      • Blockage, crush, or damage in the hose and the piping of intake air passage between inlet air duct and intake manifold.

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Repair or replace error-detected parts.

  2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 

    Check EVAP control system pressure sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Replace EVAP control system pressure sensor. Refer to Exploded View .

  3. CHECK MAP SENSOR 

    Check MAP sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Repair or replase malfunctioning part. Refer to Removal and Installation .