Absolutely! Under certain circumstances(like low voltage) the data in the volatile memory(RAM) of a given module gets corrupt and it start acting up. After power off reset all modules boot from the flash memory and many times that cures the problem. In other cases the flash memory gets corrupt and many times reprogramming can fix the problem. Sometimes it is so bad that the module doesnt communicate at all and sometimes it could be fixed by reprogramming the MCU directly. Leaving the battery disconnected overnight or even for 24 hours ensures all electrons are gone from the RAM cells and after reboot all data will be correct. As a matter of fact 24hr battery reset makes a difference than a brief disconnect.
Here is my ICU unit for ECUs that dont feel well