I did take the smaller hose off but left the other one on. That way I could pull the housing up, and out of the way. The smaller hose came off really easy. If it had been stuck on there, I probably would have left it on.
My 2008 has done this intermittently for a year or so, mostly in colder weather just as written here by others. Local dealer (live in Denver) replaced sending unit a few months ago, did not fix. Happened again yesterday and took it in this morning and they are getting TS code and replacing it today. My question is if computer is kicking this up because engine is not in expected heat range, how does it happen on cold startup? And how does it happen after I've parked and it's sat for an hour. It's up immediately upon startup. Oil temp stays fine, fans are running, I'm not seeing overheat issues, just curious how the code is there on cold startup. Reading through forum posts that's what I don't understand.
Hopefully replacing TS is the cure, problem is a nuisance and had me in a panic first time it happened.