P0023 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0023 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 P0023 code.

OBD II Fault Code

  • OBD II P0023

    Fault Code Definition

    • "B" Camshaft Position - Actuator Circuit/Open

    What does this mean? Newer vehicles use a variable timing system to adjust the opening and closing of the Intake and Exhaust Valves to improve fuel efficiency and engine performance. The engine control module (PCM) uses actuators to move the camshaft enough to produce the requested amount of power from the engine. If the PCM determines that the valve timing is not being adjusted as requested, the PCM will set code P0023.


    • Decreased engine performance
    • Increased fuel consumption

    Common Problems That Trigger the P0023 Code

    • Powertrain Control Module (PCM) failure
    • Variable valve timing actuator failure
    • Wiring issue

    Common Repairs Needed for the P0023 Code

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