Under some conditions your parking brake can freeze in the engaged position. This is most likely to happen when there is an accumulation of snow or ice around or near the rear brakes or if the brakes are wet. If there is a risk the parking brake may freeze, apply it only temporarily while you put the shift lever in P (automatic transaxle) or in first or reverse gear (manual transaxle) and block the rear wheels so the vehicle cannot roll. Then release the parking brake.
Kia Cee'd JD Service Manual: Engine Coolant Temperature Sensor (ECTS) Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Remove the ECTS (Refer to "Removal").
3.
After immersing the thermistor of the sensor into engine coolant, measure
resistance between the ECTS ...
Kia Cee'd JD Service Manual: Back-up Lamp Switch Repair procedures
Inspection
1.
Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner")
2.
Remove the battery and battery tray.
(Refer to Engine Electrical System - "Battery")
...