The Manifold Absolute Pressure Sensor (MAP Sensor) is a core component of the engine management system. It uses piezoresistive effects or capacitance change principles to monitor the pressure within the intake manifold in real time, transmitting signals to the ECU to accurately calculate air intake volume. This enables dynamic adjustment of fuel injection volume and ignition timing, ensuring the engine achieves the optimal air-fuel ratio and combustion efficiency under various operating conditions such as idling, acceleration, and high load. Additionally, abnormal signals from the MAP Sensor can assist in diagnosing faults in the intake system (such as leaks or blockages) or issues with the sensor itself. Characterized by fast response, high precision, and compatibility with multiple engine conditions, it is a key component for enhancing fuel economy, power performance, and emission control.