DTC C161C-86: CAN Signal Error HCU/VCU/FCU: General Description
WARNING: This page is about a different car, the 2024 Kia Sorento. However, it is still accessible from the selected car via links, so may be relevant.
Motor Driven Power Steering (MDPS) provides a different assist force according to vehicle speed when engine ON.
MDPS ECU receives from HCU as HCU1 signal.