Urgent help needed

I'm having some issues with my battery pack
So I replace all modules in my pack thinking that was the issue.....got the replace hybrid battery pack code
When I tested the replaced cells came in at about 88%
However after driving for about 4-5 days the replace hybrid battery pack code came back ....is it something defective on the battery pack component
....I was told that I have to replace the entire battery pack component .....
Is there something bad such as a fuse that is causing the pack to drain rapidly