Reply To: reading trouble codes for GV250 EFI bikes May 23, 2020 at 7:09 PM #4446 Hyosilver!👤 Member🖊 Topic Author Topics: 3Replies: 3 To end this thread I thought I’d add this manual. It tells how to read trouble codes on analogue instruments like my 2016 EFI GV250, Found the mystery code on mine as well. 0505. Idle speed control . (Edit)
