Repair procedures: Removal

Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Remove the rear seat (Refer to "SEAT " ).
Remove the fuel pump service cover (A).

Fig 1: Identifying Fuel Pump Service Cover
Courtesy of KIA MOTORS AMERICA, INC.
NOTE:
The wiring in between the fuel pump and the sub fuel sender is fastened to the vehicle. So please separate it before removing the fuel pump service cover in accordance with the procedures below.
1. Remove the sub fuel sender cover and disconnect the sub fuel sender connector (Refer to "SUB FUEL SENDER " ).
2. Release the wiring clips (A) under the carpet.
  
  Fig 2: Identifying Wiring Clips
  Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the fuel tank pressure sensor connector (A), and then remove the fuel tank pressure sensor.

Fig 3: Fuel Tank Pressure Sensor Component Location And Connector
Courtesy of KIA MOTORS AMERICA, INC.