Could be a lot of things. Low on oil? Could also be an issue with a clog in the water line somewhere. Sea strainer (if you have one), raw water pump could have a bad impeller, clog at the oil cooler. I was just with a friend this weekend on his 2008 XLV and it went into limp mode and the engine temp went up. we took apart the sea strainer and the impeller and couldn't find anything at all. We took off the hose that went from the raw water pump to the oil cooler and there was about an inch of fine debris clogging the bottom of the oil cooler. Cleaned it all out and we were good to go.