Chrysler p0403

What is your question?

2006 Chrysler 300 2.7L. Had Code P0406. Replaced egr valve and spark plugs. Now P0406 code is gone. But now I have code p0403 showing.

What makes this problem better or worse?

Runs fine.

How long has your 2006 Chrysler 300 had this problem?

After replacing egr valve and spark plugs