My check engine light comes on randomly. When I check the code it always tells me it is low boost pressure. I have changed fuel filters, air filter, as well as the boost pressure sensor. I also had the turbo checked and was told it was working the way it should. Nothing I have done has solved the issue. The check engine light does not always come on and it never a stays on. When it does come on it is always when I am asking for power. As soon as I take my foot off the throttle the light goes out. I can see the boost pressure while I’m driving and it runs between 29 and 31when asking for power. Is there something that I am missing? I have a C9 Cat engine.