First off, new forum member here. However, I have been reading info here for a while. I have found numerous post on egr valve issues. So far I have removed the manifold and cleaned the egr port. check engine light came back on same code P0401. Then I replaced the egr valve. Now the light has came back on with the same code. Don't know what else to do. Not sure if this matters or not but the TSC light has also been coming on after the check engine light. Have had the code pulled each time and it's always been the P0401. Bought this van from the original owner a year ago and have had no other problems. By the way 258,000 miles on original tranny!