P0129
Barometric Pressure Out Of Range Low
Generic code
Fuel and Air Metering
High severity
Moderate repair
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What P0129 means
- 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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P0129 on OBD DashX
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