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Crankshaft Position (CKP) Sensor

CKP is a Hall Effect-type sensor. On 2.5L and 4.0L, CKP sensor is mounted on left upper side of transmission bellhousing. Sensor reads slots on outer edge of flywheel/flexplate. There are 2 groups of 4 slots on 2.5L, and 3 groups of 4 slots on 4.0L. On 4.7L, CKP sensor is mounted on right rear side of block, above starter. A tonewheel with notches on its outer edge is bolted to crankshaft. Each slot or notch 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.

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