What is a crankshaft sensor?

A crankshaft sensor is an electronic device that monitors the position and speed of the crankshaft in an internal combustion engine. It is typically located near the crankshaft pulley or flywheel and works by detecting the teeth on a tone ring attached to the crankshaft.

The crankshaft sensor sends this information to the engine control unit (ECU), which uses it to determine the ignition timing and fuel injection timing. This data is crucial for the engine to run smoothly and efficiently.

If the crankshaft sensor fails or malfunctions, it can cause issues such as rough idling, stalling, or difficulty starting the engine. It is essential to regularly inspect and maintain the crankshaft sensor to ensure the proper functioning of the engine.

There are different types of crankshaft sensors, including Hall-effect sensors, variable reluctance sensors, and optical sensors. The type of sensor used depends on the specific requirements of the engine and the manufacturer's preference.