If you’re still relying on a basic OBD reader, you’re flying blind. Modern cars...

https://zaneznae304.lucialpiazzale.com/what-is-an-ecu-in-a-car-moving-beyond-guesswork-in-modern-repairs

If you’re still relying on a basic OBD reader, you’re flying blind. Modern cars are rolling computers where everything communicates through complex ECUs