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OBD II Fault Code

  • OBD II P200D

    OBD-II Code Intake air leak is defined as a Diesel Particulate Filter Over Temperature

    Diesel Exhaust Fluid (DEF) is used to assist in converting leftover exhaust particles to harmless gases. In order to burn off those particles, the temperature of the exhaust system needs to increase. the injection of DEF Fluid into the exhaust stream brings Diesel Particulate Filter (DPF) up to temperature. The system is then able to convert harmful NOx to Nitrogen, Carbon Dioxide, and water. The Reductant Catalyst (SRC) was added to further reduce any NOx was still in the exhaust stream. If the DPF gets too hot, code P200D is set.

    Common Problems That Trigger the P200D Code

    • Diesel Particulate Filter (DPF) failure
    • Intake air leak
    • Mass Airflow (MAF) sensor is dirty/loss of calibration
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