Modern cars are rolling computers with dozens of interconnected ECUs that...

https://www.echobookmarks.win/modern-cars-are-essentially-rolling-networks-of-computers-if-you-re-still

Modern cars are rolling computers with dozens of interconnected ECUs that constantly talk to each other. A basic OBD reader only scratches the surface by pulling simple codes, but it won’t show you the live data streams needed to catch intermittent faults