Sensor, Differential Pressure: Description: 6.4L
WARNING: This page is about a different car, the 2018 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The Exhaust Differential Pressure Sensor (2) is remotely mounted on the transmission housing. One pressure tube (3) measures back-pressure created by the valves located at the cold end of the exhaust system. The sensor monitors the pressure in the exhaust system and determines if the valves are working properly for engine performance.