P0109 – Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent

 

P0109: DIY Repairing Video Tutorial

https://youtu.be/62YvC3ytm14

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P0109 Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),Engine rough idle,Engine hesitation  

P0109 Possible Causes

  Faulty Manifold Absolute Pressure sensor,Manifold Absolute Pressure harness is open or shorted,Manifold Absolute Pressure sensor circuit poor electrical connection,Faulty Engine Control Module (ECM)  

P0109 Description

  The Manifold Absolute Pressure (MAP) sensor provides instantaneous manifold pressure information to the engine’s Engine Control Module (ECM). The data is used to calculate air density and determine the engine’s air mass flow rate, which in turn determines the required fuel metering for optimum combustion. A fuel-injected engine may alternately use a Mass Air Flow (MAF) sensor to detect the intake airflow.