S40 t5 turbo issues??
 

Hi guys I'm new to this site and I am having some issues with our 2007 s40 t5 awd. I took it to the shop for issues it came up with 16 codes that start with the mass air flow and continue all the way to the evap for gas cap. With that being said the noticeable problem is that the turbo kicks out at 3500rpm and mpg have decreased drastically the shop doesn't know where to start and I can't find a good shop that knows gas turbo cars only diesel shops if someone could help I would appreciate it thanks in advance