P1105 FORD Manifold Absolute Pressure Sensor Circuit Malfunction

Possible causes
– Faulty Manifold Absolute Pressure (MAP) sensor
– Manifold Absolute Pressure (MAP) sensor harness is open or shorted
– Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1105 FORD 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. A typical configuration employs one or the other, but seldom both.The MAP/BARO Switch solenoid valve switches it’s air flow passage according to the voltage signal sent from the ECM.
FORD Technical Service Bulletins for P1105 code
1996 FORD E SERIES ELECTRICAL SYSTEM:IGNITION:MODULE
1996 FORD F SERIES ELECTRICAL SYSTEM:IGNITION:MODULE
1997 FORD E SERIES ELECTRICAL SYSTEM:IGNITION:MODULE
1997 FORD F SERIES ELECTRICAL SYSTEM:IGNITION:MODULE
1998 FORD E SERIES ELECTRICAL SYSTEM:IGNITION:MODULE
1998 FORD F SERIES ELECTRICAL SYSTEM:IGNITION:MODULE
1999 FORD E SERIES ELECTRICAL SYSTEM:IGNITION:MODULE
1999 FORD F SERIES ELECTRICAL SYSTEM:IGNITION:MODULE
2000 FORD E SERIES ELECTRICAL SYSTEM:IGNITION:MODULE
2000 FORD EXCURSION ELECTRICAL SYSTEM:IGNITION:MODULE