YenrabPettiford We don’t have a Bird Air to look at, but I think it might be built or at least have Ninebot guts inside. If that’s the case, error code 12 is a motor phase (basically controller) issue.
Any other symptoms you’re getting or details you can provide? Is this stock or did you try to do any any mods on it? I’m guessing the scooter is not functioning.