Generic OBD-II scanners only scratch the surface when it comes to European...

https://lukaszaph075.almoheet-travel.com/my-audi-shows-a-transmission-fault-but-the-car-drives-fine-what-s-going-on

Generic OBD-II scanners only scratch the surface when it comes to European cars. These vehicles use manufacturer-specific codes that require specialist diagnostics to pinpoint issues accurately