Manifold Absolute Pressure Sensor
WARNING: This page is about a different car, the 2011 Jaguar XK and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
The manifold absolute pressure (MAP) sensor allows the engine control module (ECM) to calculate the load on the engine, which is used in the calculation of fuel injection time.
The manifold absolute pressure (MAP) sensor is installed in the air inlet of the intake manifold. The sensor is secured with a single screw and sealed with an O-ring. A three pin electrical connector provides the interface with the engine harness.
If the manifold absolute pressure (MAP) sensor fails, the engine control module (ECM) adopts a default value of 1 bar (14.5 lbf/in.2 ).
With a failed manifold absolute pressure (MAP) sensor, the engine will suffer from poor starting, rough running and poor driveability.