P0404 code?

How to Fix a p0404 Code p0404 Autohex online Help for members only, Vehicle:SANTAFE Model Year:2012 fault code:p0404 p0404 Had my EGR valve replaced 4 weeks ago on MY15 CC D2 and since then had a check engine light in 3 occasions, fault code P0404 EGR Control Circuit Performance

p0404 P0404 is a EGR circuit code You most likely have an exhaust or intake leak which is why it's running rich Check the engine bay for soot or oil