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 GaugeInstallation
•
Install the component with the specified
torques.
•
Note that internal d ...
Tachometer
The tachometer indicates the approximate number of engine revolutions per minute
(rpm).
Use the tachometer to select the correct shift points and to prevent lugging
the engine and/or overrevvin ...
Trouble Diagnostics When Using GDS
1.
The body control module can diagnose
by using the GDS more quickly.The BCM communicates with the GDS and then
reads the input/output value and drives the actuator.
...