P0AA6, 526, and 612 with +B 11.79V can this be the Aux battery

Your 612 is the detail code I believe that you're interested in doesn't that put you back in the battery case in the back the HV battery not the 12 volt this is not the hybrid isolation fault? And that detail code I thought put you in the battery case in the back of the car not the cables running to the inverter or the inverter converter itself or the AC if I'm not mistaken so if that code is active that puts you back looking for more leaks so it seems like you've got modules that are at their limit and when they get heat looks like they're discharging more than they should or whatever. You haven't noticed your fan running or anything like that? Interesting it's getting about that time of the year most places

 

Code P0AA6 indicates a high-voltage circuit current leak. The 12V battery has nothing to do with it. Check this message. You have problems in the high-voltage battery area again (subcode 612)
P0AA6, detail 526, and 612 | Page 2 | PriusChat

 

It is a hybrid vehicle (HV) battery fault for sure (INF 612), so yes, you will need to open the HV battery again. While the 11.79 V shown for B+ is not great (at a minimum, that 12 V battery needs a full charge), it is above the 10.5 V threshold the RM uses as the tipping point. Even so, I would fully charge that 12 V battery while working on the car.

It is the same issue. A physical leak of electrolyte is not what is meant by leak in the context of P0AA6-612, although, if present, it contributes to the electrical voltage leak (to chassis ground).

When you replaced the leaking module previously, did you thoroughly clean the battery case of all leaked electrolyte? If not, this could be your problem. Or, you have another module that is leaking. Replace all leaking modules and thoroughly clean the case to remove all traces of electrolyte before reassembling the battery.


[EDIT] MAX2 beat me to it, LOL.