A4 crunch on 2nd gear and few codes I cant clear

[jayzee]

Hi I have a 2005 a4 estate I have a crunch on 2nd gear and dunno what I can do to fix it plus I have manifold flap codes but can't seem to find where it is iv swapped the only parts I found with flaps but another code came up I have pictures of the codes 

[Steve Q]

The gear issue could be a linkage or synchromesh 

[jayzee]

Thanks mate and don't suppose you know where I would find a manifold flap as it's.a code I have but took.the manifold apart nothing in there and everything I'm finding either has a motor at the front of the engin or a swirl flap system but I have neither