P0404 Code... Please Help
I have a 06 F350, blue spring upgrade, straight piped exhaust, airaid air filter. No tuner or other mods. Basically stock. I was driving down the road and I noticed the engine light came on today. It did not miss a beat. Runs the same from what I can tell. Only thing I really did notice was no white smoke (its cold here) no smoke at all from what I can see driving at night. I scanned my truck just now and gave me a P0404 code which from some quick forum research points to a egr valve being clogged or needs replacement. I just replaced it about 3 or 4 months ago. Could it really be that? Any thoughts?