Hi, I'm new here. I was hoping someone could help me out. I got the P0401 code (EGR Insufficient Flow). I cleaned out all the ports (because that's usually the problem), and the code came back a day later. So I went ahead and replaced the valve, and it still came back a day later. I don't know what else to do. Any ideas? Thanks in advanced.

 

Most likely your egr ports are clogged..use the search box to research more throughly ..

 

Which model year and which engine do you have?
F23 98-02 it's usually just the main port between the upper plenum and runners that becomes clogged.
F22 96-97 the EGR manifold is fairly easy to remove and clean out, along with the ports in the runners.
J30 98-02 the main feed port between upper and lower is usually clogged and may need to be better addressed by removing the upper plenum. Gaskets are reusable.

 

I am having the same issue now. What fixed it?