'11 P0AFC-123, C1259, C1310-Need Advice please

Aloha all,
Last week I replaced the front brake pads and wham, I get the Triangle of death. Really, WTH??
This is what I did to diagnose:
1) Ran Techstream, got P0AFC-123 on Hybrid system, ABS/TCS got C1214, C1259, C1310.
a) Was able to reset C1214, would not reset C1259 and C1310.
2) Checked Hybrid battery connections and Battery ECU-Found lower 4 pins badly corroded on ECU, carefully cleaned them, put dielectric on pins and connector and thought I was going to post a fixit, but, still no go.
3) Pulled battery and all connection rails, and went through and cleaned everything shiny. Checked sensor tabs and leads-all ok. Checked individual cells, all within spec. Reassembled with dielectric.
a) Previous Techstream report said cells were at 15.6-15.7v before cleaning. Now its showing 16.4v on all blocks except 1 & 2.
4) Noted Block 1 showing 0v, Block 2, 24.98v, Block 3-14 were all 16.4v.
5) Tried resetting DTC, Triangle immediately came back on.

Car runs on engine, no Hybrid help. I thought if a Battery ECU was bad, it wouldn't show battery voltages, health, etc?
I ordered a replacement Battery ECU for GP.

I tried uploading the Techstream file but got an error.

Any help would be greatly appreciated. I'm stumped on this one. Guess you can't just replace brake pads without a catastrophe on these cars?