Help with codes for incapacitated Gen2

Hello all, I have been having issues with my beloved Gen 2 for a while. I realize all good things must come to an end but I wanted to run the codes my mechanic pulled yesterday and make sure Im not missing anything before I steal my own catalytic converter lol and responsibly dispose of my vehicle.

P3000
P0AFA
C1310
C1378

The car hasnt been driven in more than 3months. I replaced the 12v again 2 weeks ago. It turns on but the engine doesnt kick in. Just about all dash lights are on. Can shift into N. All power comes up, radio, windows, fan. Before it died last year the brake dash light would come on with the red triangle on after driving 30 or so minutes. One time the brakes would not work properly and I had to turn the car off a while before driving it to my home. The brakes pretty were at about 25%. Brake pads are fine. Changed in 2019. The display also failed a few months before it brake and red triangle issues.
Any troubleshoot advice would be appreciated. I brought this up here last year so this is a kind of continuation but with proper codes from a mechanic.

 

Thank you for the informative reply. I'll start looking around the back space.

 

Good morning would this be the voltage sensing wire harness you mention?

 

Thanks. I just wanted to make sure this was the part. I will get the correct one for my vehicle if I order one.
My display screen isn’t working some I cant run a diagnostics. Is there a way to test the Brake Power Capacitor to tell if that is faulty? That seems like a less involved repair job for diy. Thanks you.

 

Yeah,I was leaning that way, just grabbing one. Have a good weekend.

 

Hi. Do you know if I would have to reset anything or clear the codes in order to tell if the replacement works? Right now it didn’t not make a difference. The Prius didnt start up but the codes haven’t been cleared.