MAP Sensors

The MAP (Manifold Absolute Pressure) sensor, absolute pressure of admission, detects the air pressure at the inlet of the vehicle and turns it into an electrical signal which is sent to the engine’s electronic control unit (ECU) in order to regulate the stoichiometric mixture.

The MAP sensors are classified in 2 groups according to their pressure range:

  • Depression: 10 ÷ 130 kPa.
  • Over-pressure: 10÷130 kpa ≤ P2 ≥ 400 kPa. 

Some models do have a NTC type temperature sensor that allows the MAP to detect, not only the pressure, but also the air temperature at the inlet. This infor- mation is necessary for the ECU to calculate the mass of intake air in order to be able to adjust the air-fuel mixture.

The MAP sensor is located directly on the intake manifold or connected to it through a flexible tube.