Also posted in technical forums but not getting any responses there

Finally got my unlock code for my Xmas present Hawkeye for my D3 and tried it out today.

Don't know what I'm doing wrong, but on several occasions when going through menu items it actually caused error codes for Transmission, transfer case and park brake even though I wasn't in any of those menus. Easy enough to clear them with the tool, but why is this happening?

Also is there somewhere where you can check for all error codes when you first plug it in, or do you have to go through each system individually?