What Does P003A Code Mean?

    OBD-II Code P003A is defined as a Turbocharger/Supercharger Boost Control "A" Position Exceeded

    The Turbocharger Vane Control Solenoid controls the amount of boost produced by the turbocharger. Every time the key is cycled, the engine computer (PCM) runs a self-check to verify the Turbocharger Vane Control Solenoid and related sensors are working properly. The PCM will command the solenoid to fully open and close. If the PCM does not see the Turbocharger Vane Control Solenoid open and close as requested, the PCM assumes that the calibration has been lost or there is another fault with the turbocharger. Code P003A will set.A relearn procedure must be performed any time the Turbocharger or related components are repaired or replaced.

    P003A Symptoms

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

    Common Problems That Trigger the P003A Code

    • Manual turbocharger vane position relearn procedure
    • Powertrain Control Module (PCM) failure
    • Turbocharger vane control solenoid failure
    • Turbocharger vane position sensor failure

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