P0109
Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
Generic code
Fuel and Air Metering
High severity
Hard repair
Free on OBD DashX
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What P0109 means
- The fault code P0109 indicates that there is an intermittent issue with the circuit that controls the manifold absolute pressure (MAP) or barometric pressure sensor. This may cause issues with the engine's performance, including poor fuel economy or a lack of power.
Possible symptoms
- Illuminated check engine light
- Poor fuel economy
- Lack of power or acceleration
- Engine may stall or hesitate during acceleration
Possible causes
- Loose or damaged electrical connections in the MAP/barometric pressure sensor circuit
- Faulty MAP/barometric pressure sensor
- Failed engine control module (ECM)
Related parts
- Manifold Pressure Sensor: Manifold Pressure sensor measures the pressure of air flowing in the engine from outside to ensure proper fuel combustion. This car's malfunctioning pressure sensor will lead to engine misfire, poor fuel economy & rough running
Possible solutions
- Check and repair any loose or damaged electrical connections in the MAP/barometric pressure sensor circuit
- Replace the MAP/barometric pressure sensor if necessary
- Replace the engine control module (ECM) if necessary
Free on OBD DashX
P0109 on OBD DashX
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