Other options are:
1) ORM unplug the MAF sensor on the air cleaner to shut off the EGR and ignore the light, refer to the CRD Tech section.
What I do now. Old Navy was the one who made the discovery.
2) Get a hold of an SEGR and plate the pipe going into or out of the EGR valve.
What is in the plans for me. I most likely will plate the EGR pipe befor I install the SEGR. Turbo Tim and UFO are the experts.
3) There is a tune that reduces the EGR but does not eliminate it and shuts off the light.
If you go with this option, you will need to clean the EGR valve to free it up. I think Danoid (correct me if I am wrong)took his apart and cleaned it. Others have used some kinds of snake oil. Sometimes the road is so rough, the bumps and pot holes will knock it free. Joe Romas has a lot of hands on with small diesels, he has owned, driven, and worked on. So, if you want to go the tune route fix on the EGR problem, talk with him first. You will get the straight scoop, no cryptic care fully worded razzle dazzle techno speak.
To put it into perspective, the EGR valve for a diesel is of no benefit for the engine that it is for a gasser. On the gasser, it acts like a Pseudo-Octane booster and reduces NOX. On a diesel the EGR is there to reduce Nitrous Oxides that are a fixation of Junk Environmental Science. Only under very extreme conditions can NOX turn into smog. Agriculture produces 6.9 times more NOX than all forms of mobile transportation, based upon published EPA documents available for download. A Smart Urea system that would only come on under the Extreme Conditions would make more sense, but unlike the Military, when have you ever seen any sense out of the EPA or CARB.
My personal opinion is that not all of the Hippies who used LSD had the talent to be Musicians, Actors, or Artists. So the rest of the Acid Head Hippies who did not die from an overdose, went to work for Academia, CARB, or the EPA.
So if you are worried about NOX emissions out of your CRD, rip out your lawn and put in AstroTurf.
