Repair procedures: Removal

WARNING: This page is about a different car, the 2014 Hyundai Elantra GT and 2013 Hyundai Elantra GT. However, it is still accessible from the selected car via links, so may be relevant.

Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Disconnect the engine coolant temperature sensor connector (A).
Remove the sensor (B).

Fig 1: Identifying Engine Coolant Temperature Sensor Connector And Sensor
Courtesy of HYUNDAI MOTOR AMERICA

CAUTION: Note that engine coolant may be flowed out from the water temperature control assembly when removing the sensor.
Supplement the engine coolant.
(Refer to "COOLANT ")