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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 219 (Engine Control System (DTCS) (5.6L) (7 Of 8)) >> DTC/Circuit Diagnosis >> P1423 Cold Start Control >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. 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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