Our automotive experts have put together the following information about the P2039 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P2039 code.

OBD II Fault Code

  • OBD II P2039

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Reductant Injection Air Pressure Sensor "A" Circuit Low

    Code P2039 is set when an issue is detected with the Reductant Injection Air Pressure Sensor. This sensor is part of the Reductant (DEF) System.

    Common Problems That Trigger the P2039 Code

    • Powertrain Control Module (PCM) failure
    • Reductant air pressure sensor
    • Wiring issue
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