2016 western star 4900 Dd16 low boost

I have a 2016 western star 4900 dd16 and about a week ago the cam position sensor screwed up on it and since then I've have low boost and truck feels lazy.. had a new sensor put in, codes checked and even a brand new engine harness no lights on the dash and nothing showing when they plug into it... before all that when I was loaded and pulling the truck made 32-38psi or so and now it won't even make 30psi just kind of hovers around 25-27psi... anyone have a problem like this? I'm at a loss here.. truck runs smooth also with no skipping or missing

 

The sensor was replaced with oem one also I'm getting it taking in to check/adjust valves and pressure test the air to air the emissions side of things is not a problem for certain reasons... only about 80,000kms on a brand new turbo just was pulling hard and making lots of boost right until the cam sensor went bad just seems like good timing with that going