Description

Manifold Absolute Pressure (MAP) Sensor for the engine management air intake system, mounted on the inlet manifold.

The sensor measures absolute pressure inside the inlet manifold and reports it to the engine ECU, which uses the value to calculate engine load. On multi-point injection petrol applications it provides the primary load reference for fuelling and ignition timing. On Td5 2.5L 5-cylinder turbo diesel applications it works alongside the mass air flow signal to regulate turbocharger boost and to limit smoke under load.

A contaminated or drifting sensor commonly causes erratic boost, poor throttle response, uneven idle and a stored manifold pressure fault code.