Generic OBD-II scanners can only read basic codes, missing the intricate faults...

https://wiki-zine.win/index.php/Why_European_Car_Repairs_Get_Expensive_Fast_When_the_Diagnosis_Is_Wrong

Generic OBD-II scanners can only read basic codes, missing the intricate faults in European cars. Manufacturer-specific diagnostics unlock precise insights, which means quicker, accurate fixes