How Does a Crankshaft Position Sensor Work?
Purpose The crankshaft position sensor is designed to monitor the location of the camshaft within the engine. This information is used to fine-tune the timing of a fuel-injected engine. To detect the position of the shaft, electric induction is used. A crankshaft position sensor typically sends data to the vehicle’s on-board computer. If this sensor is not working properly, the computer will be unable to make fine-tuned adjustments and the engine will not run as efficiently or powerfully. Sensing Within the engine, the crankshaft position sensor must be positioned correctly to gather useful data. Usually, the sensor is placed directly next to the crankshaft. On the crankshaft, several pins are placed in the metal. Each pin is spaced an equal distance apart. Also mounted near the crankshaft is a strong magnet. This generates a constant magnetic field. When the crankshaft spins, the rotating pins cause the field to fluctuate. Because the pins are placed at known locations, this magnetic
