Has anyone had a coolant temperature sensor go bad on the 2.5s? I was about 10 miles from home when my engine check light came on and a temperature warning. It brought up the temperature gauge and it was pegged all the way to the top (solid red)! I pulled over immediately.
The bike didn't seem overly hot. I checked the coolant level and it was somewhat below the low mark, but not enough, I would think, to cause a problem. There was definitely coolant in the tank. I pulled the seat and checked the fuse for the fan and it was good. I prepared to hitch-hike back home to get my trailer, but thought I'd fire her up again just to see and the temp gauge read normal- too soon to have cooled that quickly.
I rode home and, although the engine light stayed on (normal after throwing a code), the coolant temperature stayed in the normal range. Once there I topped off the coolant and hooked up TuneEcu. It showed P0117 (coolant temperature sensor) and P0704 (clutch switch 1) codes. I cleared both and have since ridden the bike over 100 miles without issue- runs great and not hot.
From what I'm reading about the coolant sensor code- it usually indicates a bad sensor. I'm also wondering, given just how much that POS clutch switch affects seemingly unrelated things (like your gas gauge, for example) if that might not have been the cause. I tinkered with the "tang" on it for the umpteenth time and it's no longer throwing a code. Or, best case scenario, if the coolant being slightly low (maybe a pint or less) was it- but I don't think the bike was ever really overheated.
Now, I'm just a bit paranoid that I'll take a long trip and it will act up again.
p.s. the sensor is located behind the radiator in the thermostat housing (fun to get to). Related information is on pages 876-877, 656-659, and 600 in the manual