It looks like a few of the folks in your previous thread were slightly confusing, muddling the two problems of blocking/clogging/keeping closed the EGR valve and the opposite issue of the EGR being clear and stuck open. The 2nd post was correct, however he seems to have missed that yours failed open, not closed... most EGR failures are the valve being closed or a blocked EGR tube. Generally, when folks are talking about "disabling", "deleting" or "removing" the EGR valve, they're talking about blocking it off. This is the same as the valve being in the always closed position, or the tube being clogged. What you have, according to the CEL code, is a valve which is always open. This would effect performance, it's always venting more exhaust than desired back into the engine (making it cooler than the engine is tuned for and throwing off the fuel/air mix).
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