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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 208 (Engine Control System (DTC/Circuit Diagnosis) (CUMMINS 5.0L) (5 Of 6)) >> DTC/Circuit Diagnosis >> DTC P21C4-00: REDUCTANT Heater Relay Control Circuit High >> DTC Confirmation Procedure

DTC Confirmation Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Turn ignition switch ON.
    2. Connect CONSULT and activate "DEF Line Heater Test".
    3. The DTC will move to "Past" when the test runs and passes.

    Is P21C4-00 DTC current?

    YES

    Go to Diagnosis Procedure .

    NO

    Inspection End.

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