Production function:

Intake pressure sensor (Manifold Absolute Pressure Sensor), referred to as MAP. It is connected to the intake manifold with a vacuum tube. With different engine speed loads, it senses the vacuum change in the intake manifold, and then converts the change in the internal resistance of the sensor into a voltage signal for the ECU to correct the fuel injection volume and ignition timing. angle.

In the electronic fuel injection engine, the intake air pressure sensor is used to detect the intake air volume, which is called the D-type injection system (speed density type). The intake air pressure sensor detects the intake air volume not directly like the intake air flow sensor, but uses indirect detection. At the same time, it is also affected by many factors, so there are many differences in the detection and maintenance of the intake air flow from the volume sensor. , The resulting failure also has its particularity.