This warning light indicates the fuel tank is nearly empty. When it comes on, you should add fuel as soon as possible. Driving with the fuel level warning light on or with the fuel level below “O/E” can cause the engine to misfire and damage the catalytic converter (if equipped).
Kia Cee'd JD Service Manual: Rear Wheel House Trim Components and components location
Component Location
[5Door]
1. Rear wheel house trim
[3Door]
1. Rear wheel house trim
...
Kia Cee'd JD Service Manual: Specifications
Specifications
Item
Specifications
Working voltage
DC
12V
Operating force
14.7 ± 2.9N
(1.5 ± 0.3kg, 3.3 ± 0.7lb)
Working temperature
-40°C ~ 80 ...