Modern cars are essentially networks of computers on wheels. If you’re still...

https://wiki-triod.win/index.php/Why_Does_My_Check_Engine_Light_Keep_Coming_Back%3F_Stop_Clearing_Codes_and_Start_Fixing_Cars

Modern cars are essentially networks of computers on wheels. If you’re still relying on a basic OBD reader, you’re only seeing a fraction of the story. Those scanners miss the deep, system-specific codes buried in individual ECUs