OBD II Fault Code

  • OBD II P2439

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Secondary Air Injection System Air Flow/Pressure Sensor Circuit

    The Secondary Air Injection System (AIR) pumps outside fresh air into the Exhaust System during cold engine start up. This additional air helps burn up the highly rich exhaust emissions that are produced when the engine is warming up. The engine computer (PCM) uses a AIR Pressure Sensor to monitor the functionality of the AIR system. If the AIR Pressure Sensor sends back an implausible signal, code P2439 will be stored. On some vehicles, the Pressure Sensor is part of the AIR Control Solenoid.

    Common Problems That Trigger the P2439 Code

    • Powertrain Control Module (PCM) failure
    • Secondary Air System pressure sensor failure
    • Wiring issue

    Common Repairs Needed for the P2439 Code

    Not the OBD-II Code You're Looking For?

    No comments yet…

    Sign in to comment