Manifold Absolute Pressure (MAP) Sensor

Gasoline and Diesel Engines

The manifold absolute pressure sensor (MAP sensor) (9F479) is used on some applications. The MAP sensor measures the pressure in the intake manifold (9424) and provides this information as a variable frequency signal to the powertrain control module (PCM) (12A650). With the Ignition Switch in the KEY ON/ENGINE OFF position, the manifold absolute pressure sensor will indicate the barometric pressure in the intake manifold. The MAP sensor is used to indicate boost pressure on the diesel engine. This sensor is not required on a sequential fuel injection system.