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OBD II Fault Code

  • OBD II P0239

    OBD-II Code Decreased engine performance is defined as a Turbocharger/Supercharger Boost Sensor "B" Circuit

    The Boost Pressure Sensor tells the engine control module (PCM) how much boost is actually being created by the turbocharger. When PCM detects an incorrect signal from the Boost Pressure Sensor, the PCM will set code P0239.

    Decreased engine performance Symptoms

    • Decreased engine performance
    • Increased fuel consumption
    • Lack of boost from the turbo/supercharger

    Common Problems That Trigger the P0239 Code

    • Brake booster pressure sensor failure
    • Exhaust leak
    • Powertrain Control Module (PCM) failure
    • Turbo/supercharger failure
    • Wiring issue

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