How about unplugging/replugging the battery? Maybe it is a stupid glitch that this would correct. Even though it is a long shot, I like starting with the simple things.
Mark86 thank you so much for this solution!!
I just installed a backup camera on my 06 V8. I unplugged the harness connecting the ecu to the latch motor. When I reconnected the latch would not work properly. It would manually latch w/ a loose fit. Opening required doing it manually.
I disconnected the battery for 5 minutes , reconnected & the latch works perfectly.