P1404 GMC - how to fix this?

Question

I have this code on my 2001 GMC Sierra 4X4. What steps do I need to take to try and fix this myself?

Answer 1

Hi there

Usually removing the EGR valve and cleaning the egr ports and the egr valve with carb cleaner will resolve the code and the issue. Sometimes the buildup of carbon prevents the egr pintal from closing tightly or moving