Ever since I have swapped my engine, I get a p2261 error. It is the same bypass valve on the same turbo assembly as the old engine. I have checked the electrical and vacuum connections multiple times. The weird thing is that it seems to work OK. The boost seems well controlled. I can feel the computer controlling it. I have a boost/vac gauge and it will shoot up to 18-20 and drop back down to ~15. I might try a new valve but hate to just throw money at it if it is something else. Anyone else have experience with this issue?