| Description |
The Hybrid Power Control Unit (HPCU) uses various semiconductors that are supplied with high voltage, hence generating more heat than engine combustion devices. Overheating can decrease the efficiency of control devices, restrict proper operation and melt semiconductors in excessive heat, causing system failure. To prevent this, the hybrid system is equipped with a separate cooling system.

Radiator Components and components locationKia Niro 2017 (DE HEV) Service Manual: Components and components location
Components Location
1. Engine Control Module (ECM)
2. Manifold Absolute Pressure Sensor (MAPS)
3. Mass Air Flow Sensor (MAFS)
4. Intake Air Temperature Sensor (IATS)
5. Engine Coolant Temperature Sensor (ECTS) [Water Temperature Control Assembly]
...
Kia Niro (DE HEV) Owners Manual: If the engine overheats
If your temperature gauge indicates overheating, you will experience a loss of
power, or hear loud pinging or knocking, the engine is probably too hot. If this
happens, you should:
1.Pull off the road and stop as soon as it is safe to do so.
2.Place the shift lever in P (dual clutch transmissi ...