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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 216 (Engine Control System (DTC/Circuit Diagnosis) (CUMMINS 5.0L) (4 Of 6)) >> DTC/Circuit Diagnosis >> DTC P203F-00: REDUCTANT Level Too Low >> Diagnosis Procedure

Diagnosis 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. CHECK DTC PRIORITY 
    1. Turn ignition switch ON.
    2. Connect CONSULT and check for current "ENGINE" diagnostic trouble codes.
    3. Check for DTC P203F-00 being current on the CONSULT screen.

    Is applicable DTC current?

    YES

    GO TO 2 .

    NO

    Refer to Intermittent Incident .

  2. DISABLE THE DTC 
    1. Low DEF level has been detected in the tank. Add DEF to the DEF tank.
    2. Using CONSULT erase ENGINE diagnostic trouble codes.
    3. Operate the engine within the "Conditions for Clearing the DTC" found in the DTC description.
    4. Using CONSULT check for current "ENGINE" diagnostic trouble codes.

    Is P203F-00 DTC current?

    YES

    Diagnosis procedure needs to be repeated. Refer to DTC Description .

    NO

    Repair complete.

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