123 Sub Code on P0A80?

Can anybody tell me what the 123 sub code is on a P0A80 code?
My 2010 base model with 302,000 on the clock has been intermittentantly throwing the code for the last four months.
I clear it and it will run flawlessly sometimes for several days(some times for 30 miles) and then trip again. Rinse and repeat
All of my mystery started about six months ago when I had to slam on the brakes and in the process must have killed the ABS module. I replaced that using my X-Tool to do all of the bleeding and calibration. I was hoping that that was the cause of the P0A80, but, alas, it was not.
Then, I got the code P0AA6 with sub code 612 I think. I forget, but it was the code that pointed to the battery pack. Took the pack cover off and found that the terminal plates were fairly green and corroded. Cleaned them with sulfuric acid, polished them to a mirror finish with 2500 wet, put the pack back together and that code has gone away, but I still get the the intermittent P0A80.
I have the Torque App and moniter the battery on long trips(150 mi) and all of the banks stay within .5 of each other, mostly .1-.3
When I park it with the A/C on and load the battery, 6,7,8 will eventually get up to about .8 difference before the engine cranks.
I know that the battery has been worked on before because they are numbered and some bolts were missing on the case.
All of the modules have (K) on them, 2009 I think? so I don't know if they are original to the car or not. If they are, they are rightous modules I do have the hybrid automotive grid charger and balance/condition as precribed.
Oh yeah, shortly after I bought her,(can we say her anymore I had to replace the head gasket. That was at about 230,000 miles.
I know that I am going to have to re-pack her fairly soon, but I realy would like to squeeze/massage her a little farther down the road first.
Back to my original question, 123?
Oh, I do have techstream, that is how I got the sub codes but for what ever reason, it won't do live data, so that is why I use the torque app. Plus it is a lot more convenient than having a mini vci cable around your feet while driving.

 

Thank you. I kind of figured since nothing came up in a search. What the hell does AFAIK stand for?

 

Ok then. I know somthing now that I did not know 10 minutes ago. Thanks.

 

Thank you, I was wondering about the ecu.