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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Control System (DTC/Circuit Diagnosis) (Pr25DD) (2 Of 4)) >> DTC/Circuit Diagnosis >> DTC P0401: EGR System >> DTC Diagnosis Procedure >> PR25DD engine

PR25DD engine

WARNING: This page is about a different variant/trim than selected.
  1. CHECK EGR PASSAGE 

    Check the following parts for clogging and damage.

    • EGR tube
    • EGR hose
    • EGR cooler

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Repair or replace malfunctioning part

  2. CHECK EGR VOLUME CONTROL VALVE VISUALLY 
    1. Remove EGR volume control. Refer to Exploded View .
    2. Check if foreign matter is caught between the EGR volume control valve and the housing.

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace malfunctioning part.

  3. CHECK EGR COOLER VISUALLY 
    1. Remove EGR cooler. Refer to Exploded View .
    2. Check if foreign matter is caught between the EGR cooler and the housing.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace malfunctioning part.