Modern vehicles are essentially computers on wheels. While a basic OBD reader...

https://www.bookmarkingqueen.win/modern-vehicles-are-essentially-rolling-computers-with-dozens-of-interconnected

Modern vehicles are essentially computers on wheels. While a basic OBD reader is fine for checking simple engine lights, it only scratches the surface. To fix today’s cars, you need the power to talk to every ECU and view live data streams in real time