Air Suspension Issue

[4.8isguy]

So about a week ago I took my car in to the shop to get the drivers side rear wheel bearing replaced and after driving the car home I get out and realize the left side of the car is sitting much lower. I go into Inpa and tried to do the ride calibration and always end up with the car at almost max height. I tried typing in negative numbers to lower it and the front responds very well and almost instantly but the rear doesn't really respond. I went into "hand mode" which allows the car to be raised up with the pump manually and am able to control the rear pretty well but it seems the rears end up lowering themselves while driving or until the self level inactive message comes up. Once the self level message comes up they somehow end up in max height both front and back. Last time I pulled the self level code on inpa it gave me the (air pressure constant message). I did install the compressor repair kit this weekend and it hasn't really changed much. Not sure what to think. This inconsistency started after the wheel bearing was changed. I'm not sure if the cause is maybe the level sensor isn't plugged in, bad compressor, or bad module. Is the level sensor something that can be checked while the car is parked or do I need to have the wheel removed. Car is parked on street during week so no access until the weekend if I need to remove my wheel. Also, I left the car parked for 3 days on the max setting and the height did not drop at all.