Not enough information in Your post.I assume that You plugged it back in and there is a check engine light or an indication to check power steering and hill assist. These will go away by themselves,when the car decides that there is no longer a problem. This could take several thousand miles.Hopefully, someone doesn't tell You to get a scan tool and clear the code. New cars don't work that way.The check engine light will go off long before the code goes away.
If Your are concerned with the dealer seeing the code, I would tell them up front what happened and they will ignore the code. Unless You don't need service for 2 or 3 thousand miles.Then don't worry about it.

 

The OBC has the ability to record such goings on and keeping the info for the dealer to see. I had one come on back and used my code reader to read the code then erased and no more light was on. I was installing the devise to make the engine run on all 6 cylinders at all times,,wasn't fiddling around with eh MAF. Afterwards I went to the dealer for a 30,000 mile check up and fluid changes, and nothing was noticed about the light coming on. With the MAF being unplugged,,one thing you never do is unplug one while the engine Is Running, this can cause harm in some cars, that can cost big money to fix, hopefully it hasn't for you. I would use the code reader and turn off the light,,just to make sure damage hasn't been done to the system

 

no damage has been done to the car. The lack of information throws a code. Hill Assist? you mean Traction control. (also if your going to describe lights on the dash its important to get that right) That is always the first light triggered when a system detects a fault. Its normal. Let it clear itself and you will be fine.