Parking sensor issue speaks for itself but you can do some testing via measuring blocks but obv prob broken or harness loose (unlikely).
HVAC code = servo controlling flap across heater blower either linkage has detached / servo has a problem / blockage preventing linkage rod actuating fully.
Try resetting all servos in VCDS via the HVAC option. I don't remember off the top of my head what group this is in but you can find the instructions out there and they will all end up reading ''000000...'' across the board when complete.
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