Crankcase Pressure Sensor - NAS Only

WARNING: This page is about a different car, the 2019 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

The crankcase pressure sensor is located on the top of the vent module.

The sensor is a pressure sensor containing a piezo-resistive pressure element and amplification circuitry. The sensor has an operating pressure range of -10kPa (-1.45 lbf/in² ) to +10kPa (+1.45 lbf/in² ) and an operating temp range of -40°C (-40°F) to +145°C (+293°F).

The purpose of the crankcase pressure sensor is to detect when a crankcase vent pipe is disconnected. Under normal operating conditions the sensor should detect a negative pressure value. When a pipe is disconnected and opened to atmospheric pressure, then a reduced amount of negative pressure or positive pressure will be detected by the Powertrain Control Module (PCM), signalling an error state with the positive crankcase ventilation system.