P0045 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0045 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 P0045 code.

OBD II Fault Code

  • OBD II P0045

    Fault Code Definition

    • Turbocharger/Supercharger Boost Control "A" Circuit/Open

    What does this mean? The engine computer (PCM) uses a Vane Control Solenoid (also referred to as a boost control solenoid) to control the amount of boost from the Turbocharger. If the Vane Control Solenoid does not operate as commanded, code P0045 will set.


    • Lack of boost from the turbo/supercharger

    Common Problems That Trigger the P0045 Code

    • Powertrain Control Module (PCM) failure
    • Turbocharger vane control solenoid failure
    • Wiring issue

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