The effective functioning of automotive control systems relies not only on pressure sensing but also on the precise measurement of the position of shafts, valves, and levers. In automotive electronics, measuring the angular position or velocity of shafts is common. The crankshaft position sensor (CPS) is essential to modern engines. It plays a crucial role in providing vital information to the engine control module (ECM), which controls ignition timing, fuel injection sequencing and is responsible for regulating various engine functions. In this article, we will discuss a crankshaft position sensor, its importance, its functions, and its advantages.