Crankshaft Position (CKP) Sensor

CKP is a Hall Effect-type sensor. On some vehicles, CKP sensor is mounted on left rear side of transmission bellhousing. On other vehicles, CKP sensor is mounted on right rear side of block, near cylinder head. Sensor reads slots on outer edge of flywheel/flexplate or on crankshaft counterweight. Each slot causes a pulse to be generated as it passes under CKP sensor. Signal generated provides engine speed and CKP information to PCM, which along with other input signals, determines fuel injection sequence, ignition signal and spark timing.