i have the same kind of problem, all thou mine looks like it's speed related. i have renewed the speed censor on the rear of the transfer box, checked the electric connections on the steering rack and checked the rear prop shaft bolts. all with no result.
Hi bgrangeThis is a documented fault with KIAs and not only with the Sorento'sI have been in-touch with KIA UK, and they are denying that there is a fault as it has not been reported to them !!I am still in talks with them, and I will update as / when