Re: P1335 Error on 07 F250 Deisel
i don't know why thats not working. anyway it says it is a common problem in the diesels. It is a egr valve not functioning properly. They say that it is possible to clean. If the valve is not opening all the way it is not fuctioning properly. I don't know much about cleaning it, maybe just replace it. It sounds as if it is a common problem with the ford diesels.