5462277 OE Crankcase Pressure Sensor.
This sensor is responsible for informing the ECM of the pressure at the filter.
For 2007.5, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Dodge Ram 6.7L Cummins
On 6.7L Cummins, the crankcase breather runs through a filter and then recycles the spent crankcase gases back into the air intake before the turbo. This sensor is responsible for informing the ECM of the pressure at the filter. If your sensor is in need of replacing, this is a genuine Cummins direct replacement unit.