zoran

I have the same problem on my Q5 3.0 tdi with the same code which appeared after I changed the gearbox oil? and the gears started make noise and not engaging properly. Can this fault cause the gear malfunctioning? It is written ...bypass flap air cleaner valve ...Open circuit. But above that in blue is written ..Checking coding/versions of control modules in drivetrain? Can anyone please assist how to go about this. Thanks Z