The warning light illuminates if the temperature of the engine coolant is above 120±3°C (248±5.4°F).
Do not continue driving with an overheated engine. If your vehicle overheats, refer to “Overheating” in chapter 6.
✽ NOTICE
If the engine coolant temperature warning light illuminates, it indicates overheating that may damage the engine.
Kia Cee'd JD Service Manual: Sunvisor Components and components location
Component Location
1. Sunvisor
...
Kia Cee'd JD Service Manual: Heated Oxygen Sensor (HO2S) Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the HO2S connector.
3.
Measure resistance between the HO2S terminals 2 and 5 [B1/S1].
4.
Measure resistance between ...