Interesting, Andy! I was under the impression one had to "tune out" the EGR code or just put up with the CEL.
I've also read that a lucky few cars don't ever send a CEL when simply unplugged.
Both my cars have the "Dynamic EGR" tweak, but I continue to run unplugged in my '03. Just hate the whole idea of EGR.
It just doesn't get that cold here, either. I wonder if turning down the duty cycle would have any weird effect on my dynamic tweak.
Would be nice not seeing that CEL!