I recently cleared the codes and they have not returned. The van was do for inspection so I waited a few drive cycles ( less than 16 cold starts about 60 miles) before taking it through inspection. From the start I was hoping that I fixed the problem when I change the EGR, but for some reason the codes did not clear on their own. Not knowing if enough start had passed since resetting the codes I took the van through inspection anyway and it passed. The EGR must have been the problem from the beginning and just did not clear. Thanks to everybody who gave me some input.