Crankshaft position sensor and knock sensor (Discovery 3)

Crankshaft position sensor

Item name	Spare part number	Description
1	-	crankshaft position sensor (CKP)

The crankshaft position sensor is located at the rear of the oil pan. It is an electromagnetic sensor that generates a signal for the speed and position of the crankshaft. For more information refer to Electronic Engine Controls (303-14B Electronic Engine Controls - 4.4L)

Knock sensors

Item name	Spare part number	Description
1	-	Bolt
2	-	Knock sensor

Knock sensors are installed in the cylinder block on the inside of each cylinder bank. They are piezoelectric sensors that generate a signal to detect and localize combustion knock. For more information refer to Electronic Engine Controls (303-14B Electronic Engine Controls - 4.4L)