Car ran then park for 1 month put new battery now won't start and this code shows up
The vehicle has a high speed computer and data lines in it. The data lines are called a "bus." When you get a "no bus" it usually means that some module connected to the bus has shorted out to the data lines and now it won't transmit data. One way to track that down is to disconnect the modules one at a time.
My guess is that you're in way over your head here. You'll need a high end scan tool and a pro wiring diagram to track this down.