DTC P0C3B-12: DC/DC Converter Temperature Sensor 'A' High: 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.
The Low voltage DC-DC Converter (LDC) converts high voltage to low voltage and charges the auxiliary battery. The LDC is located in the Hybrid Powertrain Control Unit (HPCU).
Temperature Sensor "A" is located in the LDC and detects the internal temperature.