Can anyone elaborate what this means:

 

I've never seen that before. Is that displayed while the car is off? I checked my manuals and couldn't find anything on that.

 

I think 01-DD indicates Master Reset. Did you do any of the following: 1) Do a Nav override?; 2) mess with Nav harness?; 3) disconnect battery recently? Have you tried clearing the code and see if it returns?? Other than those mentioned, haven't a clue without knowing what the sub code means.