I dont have any codes but i had a hitch installed yesterday. They had to remove the bumper and the harness provided by the dealer plugged right in. However, there was no power to the plug so they called my dealership and they said i have to go in so they can reflash it this week to get the power to the plugs.
IMO they better not charge me any cost to reflash this since i paid for the options already and the power to the plugs should have been activated right away.