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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 490 (Engine Control System (VK56VD) DTC/Circuit Diagnosis (5 Of 6)) >> DTC/Circuit Diagnosis >> DTC P1423: Cold Start Control >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD and 2019 Nissan NV2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC PRIORITY 

    If DTC P1423 or P1424 is displayed with other DTC first perform the trouble diagnosis for other DTC.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Index .

    NO

    GO TO 2.

  2. INSPECTION START 
    1. Turn ignition switch ON.
    2. Erase DTC.
    3. Perform DTC confirmation procedure. Refer to DTC Description .
    4. Check 1st trip DTC.

    Is the 1st trip DTC P1423 or P1424 displayed again?

    YES

    GO TO 3.

    NO

    INSPECTION END

  3. REPLACE ECM 

    Replace ECM. Refer to Removal and Installation .

    INSPECTION END

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