I am writing from Poland and I am happy owner of Nissan Quest 2004. I really love this car and having four kids it is a big pleasure to drive with it. I have exactly teh same issue with my Quest which I can not pass over 3000 rpm with “engine service soon” lamp on and code …403 from EGR.
Did replacement of ECM help finaly in your case?
I wonder what i should do in Poland with this kind of problem:). Even I buy on ebay new ECM do you know how if this is possible to do outside dealer?
Too many question sorry about that and thanks in advance for any help