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Home >> Nissan-Datsun >> 2005 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System (QG18DE)) >> DTC P0451: EVAP Control System Pressure Sensor >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
  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: Checking ECM Ground Connections
      G02450026Courtesy of NISSAN MOTOR CO., U.S.A.

    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: Disconnecting EVAP Control System Pressure Sensor Harness Connector
      G02450027Courtesy of NISSAN MOTOR CO., U.S.A.
    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