Yesterday while on the way to a meet i threw a code upon checking it was P0401 EGR flow low. The car was running rough at idle. Reading a few posts seems one of the egr hoses can come off sometimes maybe under higher than normal boost. I am on E85 with cams at 28psi. I looked around and a hose had come off the egr valve so I put back on and all is well now.

 

huh? Why post this? lol

- Bryan

 

Bryan your posts I have found have helped me and while searching and finding causes for my code I just thought I would add mine to the mix as a recent issue. Glad i could entertain you