Hi All,

First post for a Powerstroke newbie although the gap is slowing closing. Anyways I can use some help. I recently had the HPOP and IPR in my 2004 6.0L replaced( ouch$$$). Since then I have had a P0401 code showing up. I went ahead and replaced the EGR valve and I cleaned the IAT2 sensor. Neither of which were very dirty. The code still shows up. The truck runs fine with no loss of power. Any ideas what to do from here?