DTC C2380-01: ABS/TCS/ESP Valve Error: 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 ESC is composed of a Electronic Control Unit (ECU) and an Hydraulic Control Unit (HCU), so the ESC hardware includes all solenoid valves inside the unit as well as the ECU.
Solenoid valves are switched to ON, OFF by ESC when the ESC is activated. Solenoid valves function is to increase, decrease or maintain the hydraulic pressure supplied to a wheel cylinder.