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OBD II Fault Code

  • OBD II P2059

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Reductant Injection Air Pump Control Circuit/Open

    Code P2059 sets when the Reductant Injection Air Pump fails to operate properly. This pump injects air into the Reductant (DEF) System.

    Common Problems That Trigger the P2059 Code

    • Powertrain Control Module (PCM) failure
    • Reductant injection air pump failure
    • Wiring issue

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