2008 Infiniti G37s coupe 6MT

I was driving home the other day and my check engine light came on.

checked the code and it was for coolant temp sensor.

cleared the code and it hasn’t came back for about 2-3 days. However the car sounds like it struggles to start sometimes, but it runs perfectly fine.

code hasn’t come back at this point. Is it something I should worry about?

temp gauge on the dash looks normal in the middle of hot and cold when it is at running temps.

let me know

edit: this morning I went to leave, pressed clutch in, hit start button, the dash lights came on and the car attempted to start, but didn’t. Dash lights still on, pushed start again with foot still on clutch, and it started up after a slight struggle. Drives fine though