Sensor, Diesel Exhaust Fluid, Pressure: Description
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 Diesel Exhaust Fluid (DEF) Pressure Sensor is housed inside the DEF Supply Pump that monitors supplied pressure to the DEF Injector. The DEF Pressure Sensor is not a serviceable item as it is part of the DEF Supply Pump.