mark , the ports in the head are clean & un restricted
just a bit more info,
on freeze frame data @ 2950rpm Im getting 33g/s air mass no throttle on overun,thats when i get the code, on demand
in workshop @ 2950 i get 41 g/s ?
they are both very similar load conditions, what is the difference
egr closed
turbo request same
inlet flap open
manifold rail at 20%
on my previous post i stated max exhaust pressure in the workshop was 1.5 psi,actual on the road i did get 4psi full load , is that too much?
i understand the parameters are tight for logging codes on the modern car but this car is across the board 25% down on requested air mass ,im finding it tough to believe the fault hasnt jumped out & slapped me in the face