Modern cars are basically rolling computer networks. When you only use a basic...

https://reidyxab469.iamarrows.com/demystifying-vehicle-control-modules-how-many-does-your-car-actually-have

Modern cars are basically rolling computer networks. When you only use a basic code reader, you’re just seeing the tip of the iceberg. You need OEM-level software to actually talk to every ECU and view live data streams while the engine runs