What does APS mean on a car?

[HopeFitz]

APS on a car refers to the Accelerator Pedal Position Sensor, which is a device that controls the engine throttle and fuel injection pump output. It regulates the engine speed—pressing the accelerator pedal increases the engine speed, while releasing it decreases the speed. The working principle of the APS is as follows: when the driver presses the accelerator pedal, the APS generates a corresponding voltage signal and sends it to the throttle control unit, thereby controlling the throttle's opening and closing state. If the APS fails, the engine will remain in idle mode, and pressing the accelerator will not increase the speed, keeping the engine RPM between 2000 and 3000. This leads to excessive fuel consumption and, over time, can damage the engine.