What are the symptoms of a faulty intake pressure sensor?

[KendraDella]

The symptoms of a faulty intake pressure sensor include the vehicle failing to start, and even if it does start, the driving speed will be unstable with poor acceleration. Below is a detailed introduction to the intake pressure sensor: 1. Function: The intake pressure sensor (Manifold-Absolute-Pressure-Sensor), abbreviated as MAP. It connects to the intake manifold via a vacuum tube. As the engine operates at different speeds and loads, it senses changes in the vacuum within the intake manifold. These changes are then converted into voltage signals through alterations in the sensor's internal resistance, which the ECU uses to adjust fuel injection and ignition timing. 2. D-type injection system: In fuel-injected engines, the system that uses an intake pressure sensor to measure the amount of intake air is called the D-type injection system (speed-density type). Unlike the mass airflow sensor, which directly measures the intake air volume, the intake pressure sensor employs an indirect measurement method. This method is influenced by various factors, leading to differences in detection and maintenance compared to mass airflow sensors, and the resulting faults have their own unique characteristics.