Crankcase Pressure Sensor - NAS Only

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.