When I spoke to Rad, they said error 25 is pretty generic. I think he said it was a general communication error. I would try turning on the bike with only necessary connections connected and see if it resolves. Disconnect the 2 brake lever sensors, headlight, brake light, PAS sensor then turn the bike on. If it still errors you may have a controller issue, if it doesn't, try adding things back one at a time. If you can tell them the issue, your issue will be resolved quicker. They were going to send a second new controller when I found that if i boot without the PAS then the bike would not error out.