Pull the codes if you can, then try pulling the neg battery terminal for a few minutes to reset the computer.
I would also make sure you service the battery terminals while doing the pull. Clean both the posts and the terminals thoroughly and make sure you don't have wires connected to the 10mm clamp bolt. JK's are very finicky about battery voltage.
12 JK,2.5" Teraflex lift,Bilstein 5100's,BFG KO2's P305/65R17
17 WK2 Trailhawk