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: Cowl Side Trim Repair procedures
Replacement
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Put on gloves to protect your hands.
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Use ...
Kia Cee'd JD Service Manual: Fuel Tank Repair procedures
Removal
1.
Release the residual pressure in the fuel line.
(Refer to Fuel Delivery System - "Release Pressure in Fuel Line")
2.
Fold the rear seat cushion.
(Refer to Body - "Rear Seat Assembly") ...