Prius plugin won’t start - after new 12v battery

Hi Prius lovers,

Last year I bought a Prius plugin from 2013 driven 80k km. Became a fan of the car immediately, but;

4 weeks ago the 12v battery drained over night 5 times within 2 weeks. I went to the Toyota dealer garage, twice. Second time they replaces the battery with an official Toyota battery.

After paying more then $400 total (the battery cost around $200), I thought our problems where over. We drove 2 weeks without problem. Charged it once or twice, also parked it with putting it in the charger four times at least. And couple of days of not driving.

Suddenly the car won’t start again... argh... Clueless... And I can’t seem to find similar cases online.

Earlier in the garage they did read 2 errors from the main-computer in the Prius: error coming from the hybrid-computer and an error from the plugin-computer. So now I’m afraid the problem causing the 12V to drain over night is way bigger then the small battery itself... ;-0

Who can give advice where to start looking for solutions for this problem? Or better, ever experienced something like this?

And, did the official Toyota dealer garage did a wrong job in replacing the old battery with a new one, dsould I still pay for the new one? The old one they measured before and seemed all good - gave all green light... So if the problem is coming from another source, I shouldn’t have to pay for the previous fix / new battery / hours of work, I assume...?!

Any help, would help!

Thanks in advanced.

 

Thanks all,

The codes are:
P2511 - 149HV Hybrid Control / power relay
sensor circuit interrupted
P2511 Plug in control - reset detected

Update:
AAA came and started the V12 and did a test if the battery leaked. No leaking, seemed all good. BUT when we plugged in the power cord again, from the power pole (default ones in Amsterdam city) the AAA-device showed indeed a power leakage...! So when parked charging, the car seems to get into some sort of feedback loop internally, which costs the V12 battery to give power and drain... (and there seemingly is NO WAY the power poles in Amsterdam can take energy from a car, so it MUST be an internal error within the car) argh...

Coming Tuesday I'm bringing the car to the official Toyota dealer. And will come back here with an update.

Thanks again and till soon![/QUOTE]