Ford P0109 OBD-II Trouble Code Definition:
P0109 Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 Ford OBD-II Trouble CodeDescription:
OBD Trouble Code P0109
Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
What does the code mean? OBD-ii Code P0109 definition:
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. A typical configuration employs one or the other, but seldom both.
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. A typical configuration employs one or the other, but seldom both.
Symptoms Sumptoms of OBD code P0109
Engine Light ON (or Service Engine Soon Warning Light) Engine rough idle Engine hesitation
Engine Light ON (or Service Engine Soon Warning Light) Engine rough idle Engine hesitation
Causes Causes of the OBD-II code P0109
– Manifold Absolute Pressure harness is open or shorted – Manifold Absolute Pressure sensor poor electrical circuit connector – Faulty Manifold Absolute Pressure sensor – Faulty Powertrain Control Module (PCM) or Engine Control Module (ECM)
– Manifold Absolute Pressure harness is open or shorted – Manifold Absolute Pressure sensor poor electrical circuit connector – Faulty Manifold Absolute Pressure sensor – Faulty Powertrain Control Module (PCM) or Engine Control Module (ECM)
Solutions Replace and Check any of the Causes listed above