Edit: Okay so I found the issue. Long story short it was a low tire which triggered the TPMS and that will cause it not to switch into sport mode.

2014 335xi 90k miles

I bought this car used from a dealership one year ago.

Spark plugs and ignition coils replaced less than 10k miles ago

Transfer case went out so I bought xdelete and drive it around as a RWD car.

Current mods (that I know of): FMIC Wagner tuning High flow down pipe Wagner tuning CTS Cold air intake.

I purchased the F30 N55 MHD super license and flashed my car and nothing happened. No burble, no start up roar, car was practically the same. Now I have a check engine light, drive train malfunction, and my car will not go into sport mode now. I took the tune off and flashed it back to stock that got rid of the drive train malfunction but still will not go into sport mode. I'm so lost please help.