P0129

2017-10-10

Description:

  • The fault code P0129 indicates that the barometric pressure in the engine is too low. This can cause a variety of issues with the engine, including poor performance and reduced fuel economy.

Possible Symptoms:

  • Reduced engine power or acceleration

  • Poor fuel economy

  • Illuminated check engine light

  • Rough idle or stalling

  • Difficulty starting the engine

Possible Causes:

  • Faulty barometric pressure sensor

  • Vacuum leak in the intake manifold or associated hoses

  • Malfunctioning engine control module (ECM)

Related Parts:

  • Barometric (BARO) Pressure Sensor: The barometric sensor is responsible for measuring the atmospheric pressure of the environment that the car is driving in. Problems lead to engine misfire & poor fuel economy

Possible Solutions:

  • Replace the faulty barometric pressure sensor

  • Check and repair any vacuum leaks in the intake manifold or hoses

  • Replace the engine control module (ECM) if necessary

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