New here and looking for some good technical help. Got a mess of cel's I'm trying to sort out. It all happened at once and i don't drive the Jeep right now due to not kicking into OD. Replaced o2 sensor already thinking maybe it **** out and caused a limp mode from the 0545 code but didn't fix anything. So here's what I got
1491- Rad fan relay circuit (tried several relays and check all wiring no fix)
0545-exhaust low temp bank1 circuit 1(did O2 sensor)
0443-evap purge valve
0700-trans control system malfunction
i can clear the codes with a handheld it'll idle to temp and I can get down the road about a half mile and suddenly the codes will come back and slam out of 4th

 

Clean the engine grounds, clear the codes, and try again.

 

I'll get the mini wheel out tomorrow and go to town and see what happens

 

Did the grounds as you said and the codes still come back, instantaneously. Cleaned and put diaelectric grease on everything