Theory Of Operation
WARNING: This page is about a different car, the 2009 Dodge Caliber. 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.