It might just be the TCC solenoid. I say investigate and fix. Link to the ZF 5HP19 tech docs below.
drive.google.com
ZF 5HP19 - Google Drive

What? I do not understand what you are saying.Is mine not severe enough for it to not even show any codes until you scan it with pa soft?
Codes are not shown on the dashboard, only warning lights. You gotta read codes early and often, A warning light only comes on for some issues.Like there is no code on the dash or the cog light telling me something was wrong. I only knew about the code after looking at the bmw scanner 1.4. I feel like there should of been Atleast a code on the dash or something.