p3000 sub code 123 pending code p0a80

Hey guys I am currently having a major headache with this battery. When i first checked the battery there was one bad cell so i replaced it and balanced the cells. After putting it in the car the battery seemed to be rapidly charging all the way to the tip top of green then the triangle came on. I read the codes and p3000 came up with sub code 123 and p0a80 pending. So i first thought it was a bad ecu so i changed it and started the car same result. so i thought maybe it was the connectors that hold the terminals and connect into the ecu so i changed it same result. So i decided to pull off the whole end of the battery where the ecu connects and swap the entire thing with one from a different battery same result. I am at a loss with what to try to fix this. Any input is more then appreciated!

 

All the other cells read above 7.5V and I am using a hybrid automotive LLC grid charger to balance the cells.

 

I read them individually with a volt meter outside the car

 

How do you read them under load ? I have a mini vci but honestly have barely used it I am not too familiar with all the functions.

 

Thank you both so much for the help. So i just performed the test and narrowed it down to block 7 and 9 rapidly charging and discharging faster then the rest. My question now is when I pull out the battery how to I know which cells are in block 7 and 9?

 

Thank you so much for the reply. Can you elaborate a little more on the procedure of how to do the load test with the halogen light bulb? Thanks in advance!