DTC P2766-31: Input Speed Sensor 2 Circuit Range/Performance (No Pulse): General Description
WARNING: This page is about a different car, the 2020 Kia Niro. However, it is still accessible from the selected car via links, so may be relevant.
The DCT system uses 2 input shafts and 2 "INPUT SPEED SENSORS". "INPUT SPEED SENSOR 1" detects the speed of input shaft 1 when shifting through 1st, 3rd, 5th gears. "INPUT SPEED SENSOR 2" detects the speed of input shaft 2 when shifting through 2nd, 4th, 6th and "R" gears.