Overheating with codes P3125, P3130, P3190

Please help me with my 2001 Prius.
A few days ago was literally the hottest day in the history of Portland, OR. I was waiting in the parked car with the AC on. I finally thought to myself that it could be overheating, so I turned it for 10 or 15 minutes. But apparently I rested it NOT soon enough. When I did restart the triangle of death came on. I gently drove the car 4 miles home and there there did not seem to be performance issues, etc. It drove fine. The next morning the light was still on, and I looked at the codes.

I got codes P1436, P3125, P3130, P 3190 and an impending P0304.

Some history: the car has 255,000 miles on it. The inverter fluid and oil were changed 10 weeks ago (which was 3000 miles ago prior to a road trip to Utah). The power battery was replaced by OEM at 191,000. One of these codes (P1436?) is due to the replacement of catalytic converter (which was stolen) with a cat with the wrong (or no) connection for O2 sensor; that's another issue for another thread.

I started the car and checked the inverter reservoir - Yes, the fluid is gently rolling and looks clean, etc.

What do I look at or try next?

Thank you PriusChat for helping me to understand and make best use of my wheels,
John
Portland , OR

 

Update - a week later:
I filled the gas tank, checked the oil, the inverter fluid (as above - for level and to see gentle roiling in a running engine), the radiator fluid.
Also, I cleaned the Mass Air Filter and wiped out the throttle body. Then I reset all codes.

Code P1436 about the missing O2 sensor has come back on.
But the triangle problem is not showing (yet). Wish me luck.
J