Crankshaft (4X/24X) Sensor (5.7L)

The Crankshaft Position (CKP) sensor is located on right-side of engine, behind starter. The CKP sensor is a dual-magneto, resistive type sensor. The dual micro switches within the sensor monitor both notches of a reluctor wheel which is mounted on the rear of the crankshaft. By monitoring the reluctor wheel, CKP sensor produces both 24X and 4X signals. PCM uses 24X signal to determine if a particular cylinder is on the firing or exhaust stroke. PCM uses the 4X signal for tachometer output, spark control, fuel control, certain diagnostics and to identify a cylinder misfire.

The CKP sensor signal must be available for engine to start. A diagnostic trouble code should set if CKP sensor signal is out of range, or if a cylinder misfire is detected.