Need help to solve hybrid error

Hi everyone

I am experiencing some really weird symptoms with my car and as this is the biggest forum regarding Toyota hybrids, why not ask here

It is a first generation crown hybrid that was imported from Japan( Model code GWS-204 if someone likes to know)
It basically is a big 2nd gen prius with a nice suit as it uses the same hybrid system although with a bigger engine and battery

1. Car starts always without problem( READY ON) and drives fine, just wont go to ev mode or shutdown the engine to drive on electric, Highway/extra urban consumption is what Toyota claims,
City is another thing..

2. Triangle of death comes without fail everytime engine is started, drops the SOC to 1 bar( If battery is full), but starts charging the traction battery.

3. Car came with a super dead 12v( from full to empty in less than 10 minutes) but started without jump cables. Changed the 12v to new, but the current drops after using acc mode 10minutes to 11V, even 10,5V and stays there.

. I have used techstream to read the codes and checked the freeze frames( Attached below) 2 of the battery blocks are quite low but the delta SOC is always 6% or under and SOC is always 24,5% or 25% regardless what the infotainment screen says.

So before i start to rip the battery and use gazillion euros to replace it, i would like to know the sentence of the toyota hybrid wizards.


Thanks a lot!

Only fault code now are P0A80 alone, all of these others havent come back.