Crankshaft Position Sensor

On 2.5L, 3.9L, 5.2L and 5.9L models, Crankshaft Position (CKP) sensor is mounted on or near outer edge of bellhousing and detects sets of slots on flywheel/torque converter drive plate. On 3.7L, 4.7L and 8.0L models, CKP sensor is mounted to right lower side of engine block and detects sets of slots on crankshaft sprocket.

Engine speed and crankshaft position are provided through the CKP sensor. The sensor generates pulses that are the input sent to the Powertrain Control Module (PCM). The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing. The sensor is a hall effect device combined with an internal magnet. It is sensitive to steel within a certain distance from it. A tonewheel (targetwheel) is bolted to the engine crankshaft. This tonewheel has sets of notches at its outer edge. The notches cause a pulse to be generated when they pass under the sensor. The pulses are the input to the PCM. The engine will not operate if the PCM does not receive a CKP sensor input.