Kia Optima Hybrid 2013 Owner's Manual page 143

Features of your vehicle
Low key battery
If the ENGINE START/STOP button is
pressed to the OFF position when the
smart key in the vehicle discharges, the
warning illuminates on the LCD display
for about 10 seconds.
Replace the battery with a new one.
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Press brake pedal to start engine
If the ENGINE START/STOP button is
pressed to the ACC position twice by
pressing the button repeatedly without
depressing the brake pedal, the warning
illuminates on the LCD display for about
10 seconds to indicate that you should
depress the brake pedal to start the
engine.
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Shift to "P" position
If you try to turn off the engine without the
shift lever in the P (Park) position, the
ENGINE START/STOP button will change
to the ACC position. If the button is
pressed once more it will change to the
ON position. The warning illuminates on
the LCD display for about 10 seconds to
indicate that you should press the ENGINE
START/ STOP button with the shift lever
in the P (Park) position to turn off the
engine.
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