Battery failure? Mine started doing that last night. After the winch stopped, it kept me from revving above 18-2000 RPM. Couldn't move. Shut it off, let it sit. Turn back on and get check engine light code= voltage too low.
Let it idle with no lights for half hour and was able to get it in my truck. I thank Polaris for the warning before it was totally dead, but the lights were still nice and bright.
I think what ultimately killed it was the cold. The battery was 4 years old. Got new one today at Batteries Plus today for $114. Not cheap, but it has a 2 year warranty.
If you think about it, all those lights (I have two auxiliary reverse), constantly using the winch (for hours in my case), and the cold will kill a battery.
Sorry for my rant, I was fired up last night when this went down, still am. Winter income was the justification for buying the tool, toy. Happy it was only the battery. Seemed like much worse.
I am here: http://maps.google.com/maps?ll=41.510175,-81.581320
'09 Sportsman XP 550