P0A9C code

Hello all,
Recently removed my traction battery, replaced a cell, balanced the pack and reinstalled. Everything has been going great, 45mpg with my lead foot, battery appears to charge/discharge well. Put about 500 miles on the car and then I got the game triangle of death and other lights. Download code P0A9C HYBRID BATTERY TEMPERATURE SENSOR "A" RANGE/PERFORMANCE. The fan understandably stays on now.

I remember when I removed the pack, the sensory wire on the bottom wasn't really attached to anything, so I attached it to the fan end of the battery. That's the only thing I can think of that was abnormal.

When I get time, in going to remove the traction battery and check the sensory wires on top and bottom, but is there anything else I should look for? I searched the forum and there isn't much help with this code. Thanks!