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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 Description >> PR25DD engine >> DTC Confirmation Procedure

DTC Confirmation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. PRECONDITIONING 

    If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

    TESTING CONDITION:

    Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Start engine and warm it up to normal operating temperature.
    2. Drive the vehicle at 80 km/h (50 MPH).
      CAUTION: Always drive vehicle at a safe speed.
    3. Release the accelerator pedal fully until the vehicle speed decreases to 40 km/h (25 MPH).
    4. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES

    Proceed to DTC Diagnosis Procedure .

    NO

    To check malfunction symptom before repair: Refer to Inspection .

    NO

    Confirmation after repair: INSPECTION END

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