Crankshaft Position (CKP) Sensor

WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, 2016 Land Rover Range Rover, 2014 Land Rover Range Rover, and 2013 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

The Crankshaft Position (CKP) sensor is an inductive sensor that allows the Powertrain Control Module (PCM) to determine the angular position of the crankshaft and the engine speed.

The CKP sensor is installed in the rear left side of the oil pan, in line with the engine drive plate. The sensor is secured with a single screw and sealed with an O-ring. A three pin electrical connector provides the interface with the engine harness.

The head of the CKP sensor faces a reluctor ring pressed into the outer circumference of the engine drive plate. The reluctor ring has 60 teeth, with two teeth missing. There are 58 teeth at 6° intervals, with two teeth removed to provide a reference point with a centerline that is 21° Before Top Dead Center (BTDC) on cylinder 1 of bank 2.

If the CKP sensor fails, the PCM:

Uses signals from the Camshaft Position (CMP) sensors to determine the angular position of the crankshaft and the engine speed
Adopts a limp home mode where engine speed is limited to a maximum of 3000 Revolutions Per Minute (RPM)

With a failed CKP sensor, engine starts will require a long crank time while the PCM determines the angular position of the crankshaft using the CMP sensors.