Um... -temp sensor? does it have ves? if so check and clean. look at diaphrams..you have valves is your timing right? seems to be to much of a hassel if you brought this thing to yur dealer and they couldnt figure it out give it back and tell them to keep it and go buy a polaris there ment for snow not those dam 1000c yamahas yamahas are ment for dirt and water not frezzeing snow lol and cold temperatures. youd be happyer on a polaris! less problems easy trouble shooting only so much to go wrong and there just as fast!