Sensor, Crankcase Pressure: Operation
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Crankcase Pressure (CP) Sensor (5) is mounted on the valve cover (4). The CP sensor monitors crankcase pressure that builds up as the result of combustion gas blow-by. The Powertrain Control Module (PCM) uses data from the CP sensor to determine the condition of the crankcase breather (ventilation) filter. The PCM can also determine if a crankcase breather (ventilation) filter is present.