Egr issue
 

I have a 2006 power stroke, with only 50000 on it. I recently got the code po401, so I took the egr sensor out and went to clean it and it was really sticky and nasty to clean, my friend took his out and only had to take an air hose to it to clean it. I was told that I might have and egr issue, I'm not having overheating issues or blue smoke or running crappy,it actually runs really good. I am just concerned that there might be a problem, and I might be able to fix it before bigger issues, also should I replace my oil cooler if. I do end up getting the delete kit for my egr. Thanks