Bank 1/Sensor 2

Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
Lift the vehicle.
Remove the rear under cover.

Fig 1: Removing Heater Protector From Catalytic Converter
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the heated oxygen sensor connector (B).
Remove the heated oxygen sensor (A).

Fig 2: Disconnecting Heated Oxygen Sensor Connector

Courtesy of KIA MOTORS AMERICA, INC.