On 2008 JK models I thought there was a sequence you could perform to disable the ESP? Turn steering wheel 90 degrees to the left and hold key in pre-on for 7 seconds etc...
now before we torubleshoot the issue please give us some info on your JK. Last time you rotated tires? Is it stock? where you wheeling recently?
Basic things to check include the following:
Alignment of steering wheel and make sure it's centered.
tourque of all bolts in front trackbar
also steering stabilzer