A buddy of mine brought his bike over last week. Said he say the check engine light illuminate a couple of times while he was riding. Plugged into it and saw this error. He was all set to buy a new coil and wires , even talked about the ecm being bad. Upon checking the basics, I found the threaded plug wire connector on the front plug was loose. Tightened it, checked the rear one as well, cleared the error. He called today, a week later, to tell me it's not flagged any errors since. Moral to the story.......check the obvious before throwing money at it.