Announcement

Collapse
No announcement yet.

2011 e-250 5.4 p0420

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • 2011 e-250 5.4 p0420

    My new to me E-250 with 17K is very randomly throwing a P0420 code. I changed the Bank 1 downstream O2 sensor. My LTFT on both banks really jumps around when I rev it. Does that seem right? BTW I can't get the PCM to show that it's ready for emissions testing. Always shows "yellow" on my Actron tester as opposed to green.Is there a software flash for my PCM? This CNG stuff is new to me.

  • #2
    Was this an IMPCO conversion? Look at the emissions label under the hood. You could likely still get support for it from Westport...

    Comment


    • #3
      Landi Renzo sticker also says the tanks are good until 3-2031. Leggett and Platt label is on the door jamb as doing the conversion.

      Comment


      • #4
        https://landiusa.com/service/repair-assistance/

        Comment


        • #5
          Thanks for that totally cool link. I have further investigated and now have found that the emissions failure is due to O2 sensor not complete and heated O2 sensor not complete. No codes etc. Maybe I need to drive it more on the freeway.

          Comment

          Working...
          X