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OBD II Fault Code

  • OBD II P0034

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Turbocharger/Supercharger Bypass Valve Control Circuit Low

    The Turbo/Supercharger bypass valve diverts remaining boost out the exhaust when the driver lets off the accelerator pedal. When the vehicle's control module (PCM) detects an incorrect signal from the sensor, the PCM will set code P0034.This may send the vehicle into "limp home mode", limiting the amount of power out of the engine, to protect other components from being damaged.

    Powertrain Control Module (PCM) failure Symptoms

    • Engine may enter limp home mode (reduced performance)
    • Lack of boost from the turbo/supercharger

    Common Problems That Trigger the P0034 Code

    • Powertrain Control Module (PCM) failure
    • Wastegate solenoid failure
    • Wiring issue
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