Will not start, No Bus error code

Hello, so CAN BUS is the network that all the different modules talk to each other on. There is usually 2 can bus signals, each having 2 wires, a high and low signal. So one of the other modules is failing to communicate with the engine computer. The signal can only be monitored by an oscilloscope. It is blocks of square waves. Most likely it's the body control module due to the no start condition. But how you diagnose it is, while watching the faulty signal on an oscilloscope, you start unplugging modules until the signal returns to normal. Then you have located the faulty module.
https://www.2carpros.com/articles/how-a-car-computer-works-pcm-ecm-bcm