DTC C1259-01: Steering Angle Sensor - Electrical: General Description
WARNING: This page is about a different car, the 2021 Kia Soul. However, it is still accessible from the selected car via links, so may be relevant.
The Motor Driven Power Steering (MDPS) ECU is designed to provide directional control and smooth feeling to driver when driver operates steering wheel.
There is a function to detect rotation speed and direction of steering wheel in torque sensor. Rotation speed and direction signals are used for damper, return and assist control.