Jeep 2012 Wrangler Unlimited - Owner Manual - Manual (Page 290)

or to ECO. Press and hold the right button while the
odometer/trip odometer is displayed to reset. Trip A
Shows the total distance traveled for trip A since the last
reset.
Trip B
Shows the total distance traveled for trip B since the last
reset.
ECO (Fuel Saver Indicator) — If Equipped
The ECO indicator will illuminate when you are driving
in a fuel efficient manner and can be used to modify
driving habits in order to increase fuel economy.
Trip Display Button
288 UNDERSTANDING YOUR INSTRUMENT PANEL