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What Does P0129 Code Mean?

    OBD-II Code P0129 is defined as a Barometric Pressure Too Low

    The engine control module (PCM) uses a Pressure sensor in the intake to determine airflow through the engine. If the PCM detects the signal is too low, it will set code P0129.

    P0129 Symptoms

    • Decreased engine performance
    • Increased fuel consumption

    Common Problems That Trigger the P0129 Code

    • Internal engine failure
    • Mass Air Flow (MAF) sensor failure
    • The engine is not timing correctly
    • Vacuum leak
    • Wiring issue

    Common Repairs Needed for the P0129 Code

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