Kia 2015 Rio Owner's Manual page 282

Driving your vehicle
✽ ✽ NOTICE
If the AGM battery is reconnected
or replaced, ISG function will not
operate immediately.
If you want to use the ISG function,
the battery sensor needs to be cali-
brated for approximately 4 hours
with the ignition off and then, turn
the engine on and off 2 or 3 times.
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