[Stoneve]

My 2001 Ford Ranger 4.0 liter, 4x4 check engine light came on at 50,035 miles. I took it to a popular automotive parts store and they read a P0401 code as insufficent flow and said the EGR valve needed to be replaced. I bought the EGR valve for $50 bucks. Before installing it I got on this forum and read that this code is usually due to the DPFE sensor and that Ford had extended the warranty to 50,000 miles to cover this. Well I knew I was 35 miles over that, but I called my local Ford Service department and was told that the warranty was actually extended another 24,000 miles beyond the factory supplied warranty of 36,000 miles - giving it a total 60,000 mile warranty coverage. I made the appointment, they replaced the DPFE sensor and the truck is fixed. I returned the EGR valve. This forum is great, not only did it save me money, but many hours of frustration.