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OBD II Fault Code

  • OBD II P003B

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Turbocharger/Supercharger Boost Control "B" Position Exceeded

    The engine control module (PCM) uses sensors to determine if the Turbocharger/Supercharger is providing the requested amount of boost. If the PCM determines that the requested amount of boost is not being provided, the PCM will set code P003B.

    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 P003B Code

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