Modern vehicles aren't just mechanical anymore. They are complex networks of...

https://tiny-wiki.win/index.php/OBD2_Scanner_vs._Dealer_Diagnostic_Software:_What_is_the_Difference%3F

Modern vehicles aren't just mechanical anymore. They are complex networks of ECUs that control everything from your engine to your door locks. While a cheap OBD reader tells you why a warning light is on, it rarely tells you how to fix it