P0402 - Keep getting this code...
I have a 2001 Ranger 4x4 ext. cab, w/ 4.0l v-6, AT and 146,000 miles, and I keep getting the code P0402. I've replaced the EGR valve and DPFE sensor. All of the hoses, including the ones for the DPFE sensor appear to be fine.
Strange thing is I can clear the code and not receive it again until I take it on a long drive. Long drive = 2+ hours of driving around shopping with the wife. I can drive around for weeks at a time, just going to and from work, and not have the CEL come on.
Is there anything else I can try to get rid of the CEL?