Generic OBD-II scanners might catch basic faults, but European cars often hide...

https://www.apu-bookmarks.win/thinking-a-generic-obd-ii-scanner-can-pin-down-your-european-car-s-issues-not

Generic OBD-II scanners might catch basic faults, but European cars often hide manufacturer-specific codes that only specialists can read. Add in the risk of counterfeit parts causing more harm than good, and it’s clear why expertise matters