heres an update for mine. First off, can't say enough good for both Kawi. custimer service and my dealer. The customer service rep. (Nathan) was very receptive to my calling about error code 18 popping up. He said he would talk to the technical service guys there and call me back. Guess what, he did a couple of days later. Said they belived it's a combination of 2 things on my bike. One is to clean the throttle body and second is to check on a sticky throttle cable. Nathan also made a note of my calls for future reference.My 2009 Nomad has done the same thing. Last year when it kept doing that the dealer also put it on the computer. It showed nothing. They cleaned the throttle body and all was fine. It showed up again a couple weeks ago. Twice. I took it upon myself to clean the TB as it isn't hard. I also pulled the wires off of the APS and TPS and also the air sensor. I spray them all with electronic cleaner and haven't had it appear since then. Was that the cause??? I have no idea. All I know is my 2004 Nomad with FI never had problems that we are finding with these 1700's. I do know that we all seem to be having the same types of problems and no one can figure it out completely. I bet they think we are making this up. LOL
I have the service manual and the trouble shooting in it isn't very good in these cases except to check voltages and such. Oh I have done that to. What a pain that is. The voltages check out good too.