Theory Of Operation
WARNING: This page is about a different car, the 2013 Jeep Patriot and 2013 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.
The Oil Temperature Sensor, Primary and Secondary Oil Pressure Sensor and the Input Speed Sensor use a common ground circuit that returns to the Transmission Control Module (TCM). If all of these circuits show an open (high voltage) the DTC will set.