Crankshaft Position Sensor: Description and Operation

Crankshaft Position (CKP) Sensor:

The Crankshaft Position (CKP) sensor is mounted on the engine block, behind the crank pulley. The CKP sensor consists of a magnet and a coil. The powertrain control module uses the CKP sensor for engine speed and engine misfire. The CKP sensor is not adjustable.

Operation




The CKP sensor (4) generates a magnetic field within the magnet (3) and coil (2) assembly. The CKP sensor has a specified air gap between the sensor core end and the crankshaft signal rotor (1) that is located on the end of the crankshaft (5). An AC voltage (pulse) is generated in the sensor when crankshaft rotation causes a change in the magnetic flux. The CKP sensor sends the signal to the Powertrain Control Module (PCM). The PCM uses CKP sensor input in order to initiate engine ignition and fuel delivery.