Generic OBD-II scanners can only read basic codes, missing critical issues...

https://www.bookmarking-base.win/generic-obd-ii-scanners-can-only-tell-part-of-the-story-when-it-comes-to

Generic OBD-II scanners can only read basic codes, missing critical issues unique to European cars in Malaysia. Manufacturer-specific diagnostics reveal hidden faults, while genuine parts help avoid costly failures from counterfeits