Repair procedures: Removal

Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Remove the air cleaner assembly. (Refer to INTAKE AND EXHAUST SYSTEM .)
Disconnect the engine coolant temperature sensor connector (A).
Remove the spring clip (B), and then pull the sensor from the water temperature control assembly.
CAUTION:
- Note that engine coolant may be flowed out from the water temperature control assembly when removing the sensor.
  
  Fig 1: Locating Engine Coolant Temperature Sensor Connector And Spring Clip
  Courtesy of HYUNDAI MOTOR CO.
Supplement the engine coolant. (Refer to COOLING SYSTEM .)