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OBD II Fault Code

  • OBD II P258A

    OBD-II Code Climate control systems will not work is defined as a Vacuum Pump Control Circuit/Open

    Diesel vehicle's have a separate vacuum pump an reservoir because they cannot utilize vacuum from the engine the way a gasoline vehicle's can. The engine control module (PCM) tells the vacuum pump when to turn on an off. If the PCM cannot control the pump, it will set code P258A.

    Climate control systems will not work Symptoms

    • Climate control systems will not work

    Common Problems That Trigger the P258A Code

    • Powertrain Control Module (PCM) failure
    • Vacuum pump failure
    • Vacuum pump relay failure
    • Wiring issue

    Common Repairs Needed for the P258A Code

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