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OBD II Fault Code

  • OBD II P065D

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Reductant System Malfunction Lamp Control Circuit

    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. The Regeneration System warning light should illuminated for a few seconds when the key is initially turned on. If the warning light fails to light, the engine control module (PCM) will set code P065D.

    Common Problems That Trigger the P065D Code

    • Instrument cluster failure
    • Powertrain Control Module (PCM) failure
    • Warning light bulb failure
    • Wiring issue
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