DTC C2380-01: ABS/TCS/ESP Valve Error: General Description
WARNING: This page is about a different car, the 2021 Kia Seltos. However, it is still accessible from the selected car via links, so may be relevant.
The Hydraulic Electronic Control Unit (HECU) is composed of a Electronic Control Unit (ECU) and an Hydraulic Control Unit (HCU), so the HECU hardware includes all solenoid valves inside the unit as well as the ECU.
Solenoid valves are switched to "ON", "OFF" by HECU when the ABS is activated. Solenoid valves function is to increase, decrease or maintain the hydraulic pressure supplied to a wheel cylinder.