P1121

So here’s a little history. Three months ago I replaced the inverter coolant pump and bled the cooling system and everything was working just fine after that for three months. Two weeks ago we got the check engine light on with the code P1121 coolant control valve failure. We found on forums that this is a common problem with a second GEN Prius, ours being a 2004, commonly one of the valves get stuck. Many forums also state that in most cases this leads to the heater core which simply means you might not get hot air and wasn’t considered an urgent problem. So we let it go for a few weeks… Today I was parked running the AC for about a half hour, made a stop and turned off the car for a few minutes then drove a couple more miles and all of the lights in the instrument panel came on VSC, red triangle of death, check engine, yellow exclamation point and the car with a slash through it on the MFD screen. At this point all we could do was coast, it would not accelerate. We turned off the car after a few minutes, turned it back on, the engine would run but the car would not allow us to go into reverse or drive. Also, the lights, radio, and seemingly all functions were still working properly (with the exception of the AC blowing hot air).We then tried to go into maintenance mode and a second indicator came up on the MFD screen basically indicating that it would not allow us to drive in maintenance mode. I then had the car towed. It was off for about an hour. When I went to turn it on and ran the engine, no lights came on whatsoever. I ran it for about 10 minutes and everything appeared to be fine. Although I did not actually drive it, it did go into drive and reverse with no problems.
The only codes in the system are p1122 and p3190 (which I’m told is pretty generic)
So here’s my questions? Could the p1121 code be related to this problem? Any other possibilities? I have replaced the coolant control valve but am hesitant to drive any considerable distance because I’m not sure if I’ve gotten to the root of the problem.
Thanks all for your help!

 

I’ve done some research here on priuschat and that 3190 code could be one of MANY things, some have even suggested inverter overheating so I’m tackling this option first to see if it’s related to the coolant control valve I just replaced. Thanks for your help

 

I am in Florida and I’m at 165,000 miles
Thanks for response

 

Also, some have suggested pe haps the 12v battery. I checked it and everything is great with that. Any thoughts anyone?
Thanks!