SES light and key icon lit up

I used an uncoded key to unlock driver side door, the SES light and key icon lit up. It triggered the following. 1. It will not shift out of park even when I depress the brakes, but will shift if I depress the override button in the slit next to the shift gear stick. 2. Back up camera disable, no power going to it. 3. Disable the electric power steering, steering wheel will turn but hard to steer. 4. Heater and A/C not turning on. Hook up to a hand held scanner, it pull a U0164 code (lost communication with HVAC control module). Does this mean the computer has to be reset or re-flashed at a dealer? Any suggestions would help. I activated the self diagnostic check but still the same. Disconnect the battery for forty eight hours and only turn the key icon off.