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P0129 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0129 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 P0129 code.

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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