I'm having some trouble with an LMM I've tuned with a dsp-5. It keeps throwing the p0102 code even though I have that code set for not reported no mil. The code sets at low cruising RPM's. The guy didn't have any problems with this before with his H&S Black Max on it. The EGR is not blocked but it is tuned so its not active.
Could an egr that's slightly open cause this problem?