Close

OBD II Fault Code

  • OBD II P20F7

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Reductant Injection Valve Stuck Open

    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 DEF Injector injects DEF fluid into the SCR. If DEF Injector fails to operate properly, code P20F7 will set.

    Powertrain Control Module (PCM) failure Symptoms

    • DPF regeneration may not occur

    Common Problems That Trigger the P20F7 Code

    • DEF injector failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue
    Not the OBD-II Code You're Looking For?

    No comments yet...

    Sign in to comment