My temperature gauge stop working

I've never had that happen before so I couldn't tell you how to fix it. If definitely take it somewhere asap though to get it fixed or make sure it's not over heating. If it over heats it could cause a fire. You could also call around to Honda dealerships or places to see if it's safe to drive it till you take it in plus get an estimate. Just be careful. I don't know much about cars but definitely call around.