yes, it's a 4.6L w/56K miles. Here's the funny thing about it though. Last December (2004) my COP on cylinder #7 went out. At the same time my DPFE sensor needed replacement. About two weeks ago my COP on cylinder #7 went out again so I replaced it. Now my computer is reading the code P1406 again detecting a problem with the DPFE sensor. It just seems so coincidental to me that I'm having two problems at the same time that occured together once before. Any ideas?