Conversation Between Bluegrass 7 and aminoacid

Hello. Thought I"d ask you about the P0401. I have a 99 f150 with 4.2 v6 aluminum plenum. i guess from reading I should check the EGR ports I see people saying "behind" the EGR. I just see 2 legs that go to the lower intake manifold. How do I get to the EGR ports and where are they?
Thanks