I have replaced egr valve and gasket and camshaft position sensor. On my home to on 1997 Ford Explorer

Today and check engine light came on. I read the codes with my pocket obd2 scanner and it detected 8 codes ranging from po131 po107 po401and po307. Please help. Po401 is the egr valve. It is brand new. I am hard working and seems that when i get ahead something else happens. I am a liscensed electrician and am willing to trade work for any help that comes my way. Please help

by in Rose Hill, KS on August 19, 2013
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
2 answers
ANSWER by , August 20, 2013
you may have a bad sensor ground or faulty ECM.. check all grounding points first..
ANSWER by , August 20, 2013
D.P. F. E. sensors give a bunch of E.G.R. related problems. You really need a true scanner to check this out! Ford E.C.M. failure is pretty rare as compaired to others!