Manifold Absolute Pressure (MAP) Sensor

On 2.5L and 4.0L, MAP sensor is mounted on side of throttle body and is connected to throttle body by an L-shaped fitting. On 4.7L, MAP sensor is bolted to front of intake manifold. This sensor is used by PCM to calibrate amount of air/fuel mixture supplied to engine. Sensor measures manifold absolute pressure. Ambient barometric pressure is also measured when ignition switch is first turned on and during engine cranking.