P3000 and P0A80 but car is fine

So I have the feeling I know the answer is gonna be bad but I'm holding out hope here. So I have a 2008 Prius that is currently giving me the p3000 and p0A80 codes. My car runs like butter and I've had the p0A80 code before and when it happened previously my dealer took it in to work on it they said it was just wire corrosion, fixed it up and returned it to me. Then came the blizzard, well for KY it was one anyways, of a couple weeks ago. It killed my 12volt so I had to wait till all the snow storms passed to replace it. When I first started it and drove it everything was fine. Then when I turned it off and back on all my lights lit up. Now I've gotten them all off by manually resetting them but my triangle of doom and check engine are on. I took it to a toyota certified mechanic who gave me the news. So I'm left wondering if I did something when putting in the battery or what? I am afraid of it being my battery needing replaced because of financial issues right now and hoping I just need to replace the control module.

 

Well when he gave me the codes and info he walked off into the back of his office emerged later and said looks like block 7 is going. Now the whole thing of him walking off into the back and not having the info when he gave me the rest just made it feel like he wanted to rip me off for $4,100 + tax.

Wow that's a bit outside of my comfort zone, was looking to pay for a reconditioned battery cause I really don't have the money for a new one. I'll definitely try to build one of these though for next time, I'm just not savvy enough to build this without spending a while reading the guide for it. Thank you so much though for the information I hadn't seen it on the boards so I didn't know there was a way for me to do it on my own.

The mechanic said it was my 7 cell but the way he did it made me feel sketchy so I'm gonna order that reader and use the Dr. Prius app would have been cheaper too the guy charged me $60 to just read the codes but was cheaper than everyone else who wanted $100+ including toyota who wanted $150.

Yea kinda needing a few more months on it cause by then I can afford to get a battery new or reconditioned though I'd rather go with a reconditioned was told Green Bean was good for the states.