The manifold absolute pressure sensor, sometimes known as a MAP sensor, is an electrical device designed to measure manifold pressure within the vehicle intake manifold. It is an integral part of the vehicle engine management system, located in the vehicle inlet manifold or throttle body assembly. The sensor converts the inlet vacuum (manifold pressure) into an electrical output voltage or frequency as required by the ECU. As manifold absolute pressure (MAP) can be directly related to engine load, the extent of the engine load at any point is crucial in correct vehicle engine management.