Please clarify for me. On a LMM, if I install an EGR block plate, I won't have codes. However if I install a downpipe that gets rid of the egr and heater, I will have thrown codes.
So if you put in the block plate, do you leave the egr connected and it acts more or less like a politician - sits there, but essentially does nothing? Or am I missing something?
From here the block plate seems like a great short term fix until funds allow for the better flowing pipe replacement.