Error transmission temperature high

Welcome to 2CarPros. That vehicle has at least one recall for updated software for that transmission related to it showing errors. I would probably start by making sure that is updated before any other changes. After that you might consider adding a transmission cooler if they left any room to add one. I try to add larger ones to any vehicle because heat is a big reason for transmission failure and most modern vehicles seem to be engineered to just barely make it out of the warranty before parts fail.

Most of the add-on coolers look like a small radiator that you install inline with the factory transmission coolers. I cannot find any good information on the cooling or lack of on the Vezel as Honda doesn't sell that particular version in the US and our information sources don't cover those vehicles very well. The Fit Hybrid used the same drive line but it was also not sold here. Being a dual clutch transmission it may not have a cooler at all. What you could do is call a dealer local to you and ask if it has one and if it is possible to add a larger one.

These are the styles of coolers I'm used to seeing and using. They are all designed to go into the cooling lines that automatic transmissions use, I have seen then on cars with dual clutch designs but those had factory coolers because they were high performance vehicles. Honda doesn't show if they have a cooler or an internal pump that could have one added. That is why I would investigate it with them first, if it already has a cooler then adding on should be simple. If not then it becomes a lot more work.