[Bank 1/Sensor 2]

Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
Disconnect the connector (A), and then remove the sensor (B).

Fig 1: Removing Connector (Bank 1/Sensor 2)
Courtesy of KIA MOTORS AMERICA, INC.

Fig 2: Removing Sensor (Bank 1/Sensor 2)
Courtesy of KIA MOTORS AMERICA, INC.