Crankcase Pressure Sensor

The crankcase pressure sensor measures the vacuum in the PCV system. A change in the PCV system vacuum greater than a calibrated threshold indicates the PCV system is disconnected and will set a DTC. The crankcase pressure sensor is located in the PCV system hose between the intake air system air cleaner and the engine crankcase PCV inlet.

On some vehicles, the crankcase pressure sensor has one digital signal output from the sensor. There is one reference voltage circuit and one signal return circuit for the sensor. For all others, the crankcase pressure sensor has one analog signal output from the sensor. There is one reference voltage circuit and one signal return circuit for the sensor.