Hv battery leakage// CM monitor out after replacement

So after having the HV battery leakage code with the subcodes that begin with 5 first and then the six being the third. And to replace refurbed hybrid battery that seems to be working great every so often I will get the battery leakage code and of course the car won't go in gear or ready If I clear it it'll go right in gear and go. I also changed for my 1271 code my whole dashboard took one out of a '08 car that had been running for the last however long - and everything working perfectly I put it in my '07 exactly the same every plug all of it It worked all day and then that afternoon I lifted the trunk and noticed that the door open light wasn't on and of course that means when I push the start button with my foot on the brake is going to be no display. Text dream was still sitting on the seat so I plugged it up and my 1271 code is back not even hours after replacing the whole dash top with the heads up display and all of it. What's interesting to note is with my original dash not working My MFD was not working at all now again with the 1271 code now my MFD is working fine or at least it's on where it wasn't before with this code. So I'm kind of wondering where the body control module is? I also noticed that when I put the lights on they are on low beam with the fog lights on and all the running lights are working but if I look at the dash I can faintly see a light flickering behind the high beam blue icon when I put the high beams on it lights up full blue like it's supposed to and I see high beams but sitting at low beam with all the lights on I faintly can see the high beam blue icon trying to ignite this must be some sort of a clue.