I own a 2002 Expy with the 4.6l. Last week I got the Service Engine Soon warning. Car is running fine. Tried resetting the computer...thinking gas cap issue...but light came back. I went to Autozone yesterday and the P1400 error came up. I did a search of the site and found a few threads with this question along with good suggestions on the fix but mostly for older models. Has anyone had any experience with this error on a newer model?

TIA,
Mark

 

Forget it.

Based on the info I gleaned from the search I took a chance and bought a DPFE sensor from the dealer. The guy at the parts counter sells so many of them that he keeps a stash under the desk! I plugged it in and reset the OBC and after a 10 mile test drive, no warning light.