Kia Optima: Engine Temperature GaugeThis gauge shows the temperature of the engine coolant when the ignition switch is ON.
If the gauge pointer moves beyond the normal range area toward the H position, it indicates overheating that may damage the engine.

Do not continue driving with an overheated engine. If your vehicle overheats, refer to “Overheating’’ in the Index.
Tripmeter (If equipped)
Fuel GaugeInspection
1.
Check the audio remote control
switch for resistance between terminals in each switch position.[Trip
+ Reset]
Switch
Connector
...
To remove the jack
Turn the jack socket counterclockwise. ...
Anti-lock brake system (ABS)
WARNING
ABS (or ESC) will not prevent accidents due to improper or dangerous driving
maneuvers. Even though vehicle control is improved during emergency braking, always
maintain a safe distance ...