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Home >> Nissan-Datsun >> 2007 >> Murano SE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0448 To P1212 >> DTC P0451 EVAP Control System Pressure Sensor >> Diagnostic Procedure

Diagnostic Procedure

  1. CHECK GROUND CONNECTIONS 
    1. Turn ignition switch OFF.
    2. Loosen and retighten two ground screws on the body.

      Refer to , "GROUND INSPECTION ".

      Fig 1: Identifying Body Ground Connections
      G04920135Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG

    OK: GO TO 2.

    NG: Repair or replace ground connections.

  2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER 
    1. Disconnect EVAP control system pressure sensor harness connector.
      Fig 2: Identifying EVAP Canister Vent Control Valve
      G04920013Courtesy of NISSAN NORTH AMERICA, INC.
    2. Check sensor harness connector for water.

      Water should not exist. 

    OK or NG

    OK: GO TO 3.

    NG: Repair or replace harness connector.

  3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 

    Refer to , "COMPONENT INSPECTION ".

    OK or NG

    OK: GO TO 4.

    NG: Replace EVAP control system pressure sensor.

  4. CHECK INTERMITTENT INCIDENT 

    Refer to , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    For wiring diagram, refer to WIRING DIAGRAM .

    : INSPECTION END