DTC P1807: Vehicle Speed Sensor (A/T): Description
WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
The transmission control module (TCM) transmits the output shaft revolution signal via CAN communication to Transfer control unit. DTC P1807 will set when a malfunction is detected in the output shaft revolution signal or an improper signal is input while driving.