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

https://www.mediafire.com/file/77eba7osq6tv0c5/pdf-93939-6247.pdf/file

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