Key on and shut the doors. Press "step" until "0 miles to service" is displayed. Now press and hold "reset" until the mileage resets.
unhook battery connections, wait 5 minutes then hook them back up. If that doesn't work you, you still have an engine problem that needs fixed.
Press the step button until "0 miles to service" is displayed. Press and hold "reset" until it resets.
you need to drop by auto zone or your jeep dealership and have it hooked to the diog. computer. this will tell you why the light is comming on...hope this helps