Intermittent misfire on cold start

I would run the codes to see what comes up but to me it sounds like the engine coolant temperature sensor may be out of range when cold. Here are guides to help us see what's going on:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

and

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works

Let us know what happens and please upload pictures or videos of the problem.

Hi Ken , the cold start misfire only came on cylinder “1” this is the 5th the scanner code found only happened with that cylinder, however dealership roday told me they going to open the engine head to have a check and take some diameter of some part as the factory requested that , and then they will confirm to replace the entire engine ! i'm surprised how they could think about that while the car run perfectly except that random cold misfire. i'm still thinking which internal part can cause a cold misfire.

Good call there. I would thinking an injector would be more likely. Can you please let me know what happens and what they did to fix it when you get it back?