Newby With The Prius. (Gotta Fix It Myself)

So I'm asking the brethren, for some help, please ?
Here is the history;
1) 2006 gen 2 , bog standard version, blue in color, fairly good condition, paid $3.000.00 for the unit.
second day of driving it, threw a code C1256,C1310, UO293 along with some lost communication code , triangle of death, limp mode etc etc .
2)Short version, with basic electronics background, i pulled the main battery and followed this Russian guys blog, on U-Tube who lives in US. He was extremely thorough. His ID on U-Tube is Igor Kadulenkov. So I followed the battery reconditioning to the letter, then some, I have 4 full battery packs at my disposal. Anyhow we got through it had taken a couple of intensive weeks. I drew 3-4 batteries from the donor packs as mentioned and changed out the faulty ones, balanced the pack and put it back into service.
So, it didn't work. Laugh Out Loud !
3) Moving on, I had taken note that some of the time, when I received the triangle of death, along with engine light, battery fan running, and the brake icon (I Think,)
4) Next I changed both front brake sensors (ABS) didn't fix problem.
5) So my next plan is to change my Hybrid Water Pump, Then I will put a set of new spark plugs into the engine. I am fully aware this wont fix the problem.
6) So the next major brainstorm, is to change the main Hybrid Unit under the bonnet engine bay (Inverter/Convertor Unit) which involves inverter cooling system bleed. I will go right over the vehicle disconnecting, cleaning and reconnecting electrical plugs (This Car is Not going To Beat Me) I got ripped off buying it, now I'm hopefully going to fix it .
So begging and cringing , I ask all of the prius experts to please throw their hat into the ring, throw some ideas around.
I HOPE ITS NOT THE ABS UNIT , that job looks scary. Please bare in mind, this Prius drives perfectly , sometimes it goes for two weeks before it starts the games. ABS functions perfectly , Ive tested it on loose surface. But I have 3 things, which are the following;
1)Throws the faults on hitting a bump sometimes.
2)Seems do it when screaming along at 100ks. Up until now, it usually didn't do it at low speeds. But now its starting to throw these codes at low speeds. It did it the other night while cruising slowly through a car parking station, on battery only. And It starting to do it, when going into the fault codes, using my Bosch general purpose scan tool, 200 hundred dollar unit (Generic)
So this has been plaguing me for three months, slowly getting worse. If I am forced to take it to Toyota, the battles lost.

I thank you in anticipation.

 

Thank

 

Chapman F, Your comments are appreciated. In the last few days, i am continuing driving the Prius with the faults. From time to time, I have to reset the unit, when the triangle of death appears.
So I actually drove down to Sydney a week ago. I had to reset the Prius 4 times over a 200 hundred mile round trip . (Its Kilometers here in Aus.)
So I called the guy out, to my house, who I purchased the vehicle from. He is this young guy, who maintained 23 of these vehicles, before all them being sold off. He connected Tech stream to the Prius, basically cutting to the chase, he says that my battery reconditioning job has failed. he showed me three bad batteries, along with the other codes mentioned in earlier posts. He claims on 400 stacks of bibles that as soon as i put a correct spec battery back into the Prius, all will be good."All The Other Codes Will Go Away" !
What a nice thought.
So in addition to his testing, he claimed that he was the Guru on Prius's. Gave me a bit more of a rave about how good he was, then departed.
So, I own three of these Prius's, one being a donor car. they all come from his stable . All suffer questionable batteries, as they sat around for 8 months unused. May I also add, that the guy also said that my Blue Prius (The one in question) had no faults and was a good car.
so Chapman F ? I invite you to please , if you will ? Make some helpful comments. I will accept anything including criticism . (Laugh Out Loud)
Transit

 

C1259
C1310
UO293
(Or is VO ? Hard to distinguish )
Those are the codes plaguing the vehicle from the outset . The fellow that put the Techstream onto the vehicle last week , basically said that when I get the battery right ,all of this may disappear?

 

Thanks

So let us just say there are shallow people that exist .
The deal was I pay money , in return I get a reliable Prius !
So as we manoeuvred along in the past few months , he relinquished a spare Prius for 250 bucks and I bought another with a flat battery for two grand .
My intentions are to weather the storm and take good or bad until I get them sorted .
I’ve just retired and learning about these well appointed little babies , is what I want to do .
For better or for worse . Part of the road that I’ve put myself on is joining the forum .
As I move along , one would hope that I improve
The situation is what it is !
Transit

 

OK, you guys,I'm back.
You all deserve an update on the Prius saga.
I now recondition batteries, "Success" I am not bad at it either.
The problem was "THE MAIN BATTERY" LAUGH OUT LOUD !
So i have quite a few old battery packs, no shortage in fact ! So rather than spend money, I went on YOUTUBE, learned how to reco the main batteries. Fancy that ? LOL
All those codes where "sympathy codes"
So for all you guys ? That's the deal. "FIXED PRIUS"
Do I love these little gems ? Resoundingly Yes !
I thank you guys for all your advice's and kind words.
Since I spoke to you guys a few months back, Ive driven the little gem to the moon and back .
Sincerely Always
Transit ! (AUSTRALIA BURNING )