Need some help. I replaced two cells that were low (6ish instead of 8ish) in the battery, but when I plugged everything back up I get this message:

P0AFA Hybrid Battery System Voltage Low

Car wont start at all now (Was starting with gas only and throwing error code P0A80 Replace Hybrid Battery Pack before I attempted the fix)

I will be pulling it apart again today and checking everything, but there seems to be very little info on what to do after you replace cells to ensure everything is in place as it should be.

Any tips or advice would be greatly appreciated.

EDIT: Also when everything is plugged up, what/where should I check the voltage at to ensure its the proper reading? I tried the cable that actually comes from the vehicle that connects to the battery but it didn't read anything, so I must be checking incorrectly

 

To check the pack voltage, you have to probe the +ve and -ve terminals that connect to the relay assembly(with the service plug in). I must warn that you must have proper gloves on and adhere to strick safety precautions.

 

Hopefully, he's figured it out after 9 months.

It's likely an issue with failing to connect the sensor harness plug into the battery computer.