okay i read everything here and i dont understand what to do
i got a p0402 code which is egr overflow and i had been noticeing slight power drop so i changed egr valve and cleared code and it ran much more stronger and it lasted for 2 days and the code came back up but my truck is running strong.
from what i read on the internet if its flowing to much it would idel rough and have a loss of power and mine does not have either but its got the code again.
so i was woundering what the problem could be and if someone could help me out thanks