two fault codes (know what they are) any ideas why they are showing?

[epox]

Hi peeps,
i have been getting the following codes 16487 and 17963 maf and boost exceeded, poping up usually when doing 60-70 on mway and accelerating. car runs fine other wise ie around town.
fuel trims are out a bit but smoke test shows no leaks. and new maf from tps 1000 miles ago

any ideas
Thanks Mark

 

[hades-]

VCDS wiki