It just quits and goes into neutral.

I'll go out on a limb and guess that a different scan tool, one that can show all of the car's trouble codes, will show a list that includes P0A93. That's for when the car's power electronics get too warm because their cooling system isn't up to snuff, and electrical loads start to be shed for protection, starting with the A/C, to protect the electronics. When it gets to the point of giving up charging the 12 volt battery, that voltage drops, until codes like C1241 and C2318 show up.

The P0420 is a different issue, that can be left for a different time.

Here is a thread about which scan tools can show all of the trouble codes in a Prius:

Gen2 OBD2 app review | PriusChat

 

The inverters probably getting too hot Cool it's not circulating through it that's the inlet and the outlet hoses and see the difference in temperature probably substantial

 

A Foxwell what? Inverter pump? If that's what you're talking about, it might pay to check it is still working.

 

Scantool, I'm guessing.

It's the same kind of coolant, but a separate loop. The reservoir for it is the plastic bottle nearly centered under the hood, stuck onto the side of the inverter. It's translucent plastic, so easy to see the level.

In a gen 2, it's pretty easy to check the function of the pump by turning the car just ON (two button pushes, no brake) and looking down into that reservoir for ripples, signs that the coolant is moving.

 

You're talking about a foxwell scanner I take it how do you like it does it work well Can it bleed the brakes in a Prius I haven't really looked that carefully it looks like they're a u t e l colognes as is top dog and a few others I think generally these things all run some basic software that companies kind of sort of tailor and put their own screens in and sell these things for $600 but I have seen several of the foxwell branded scanners running around locally I just haven't had time to ask the people how they like them and so on for maybe foxwell is something completely different in your market?.

 

The temperature sensitivity strongly suggests a failed or failing inverter pump. You want to get that fixed before it gets so bad it blows a certain fuse, which results in a much less graceful shut off of the car. At that point if you replace the fuse it will just blow again. If you do change the inverter pump only use an OEM one, the aftermarket ones are notorious for their short lives. Buy the pump directly from a dealer, Amazon and Ebay are awash with "OEM" fakes. You can replace it yourself if you have some simple tools and a place to work. Search in this forum and you will find a very long thread discussing methods of replacing this part, and there are several videos on youtube.