I too have just purchased a 2011 with 166k miles and has the p20e8 code (no other codes)
Definite noticeable power loss (mainly under heavy throttle) and fuel economy loss with that code. I just drove 1100 miles with it on.
Dealer replaced the pump only to the tune of $600
I told them prior to doing this that I've found many cases where other's have done the pump and didn't cure it so I wanted to make sure they understood that if it didn't fix the problem.......I'm not into "throwing parts" at something on the chance it'll fix it.
No kidding.......exactly 1 mile down the road light back on.
So I'm going back in Monday morning; they're a good dealer and I trust they'll take care of me on the $600 in the form of a refund or some sort of free services to make up for it. If not, I'll be disputing the charge on my credit card. I'll post back what I find out next week.
Is there anyone with more experience on this code that can shed light?
(not sure if there's a tank and sending unit as well that could have a problem that would throw that code???)
I"m guessing they'll need to pressure test the system.....and in my mind, it has to either be
-the pump (already replaced & no change)
-a line leak between pump and injector in exhaust
-the injector itself
But what do I know I'm a 7.3 junkie and the tree hugger system is all new to me
! I understand they're trying to "help our environment" but.....is it REALLY helping our environment?
I really think this 6.7 could be a very reliable strong powerplant if it wasn't for the emssisions junk.
y2k F250 7.3 psd Calif emissions, ext cab long bed 265/75/R16 E rated tires, 230k miles 4x4 (nv271 manual t-case) 7.3 #1247981 1/18/00 (forged rods), 3.73LSD, non-diode 4R100, Dp tuner stock, 60t 60e 80t 80e, high idle. DIY 6637 air filter, wicked wheel, turbo master WG controller, turbo lifesaver, bellowed uppies, 4" downpipe & exhaust, 203t-stat, triple pod glowshift gauges (egt, tranny, boost), Ride-rite 2330 air bags, BTS VB, Sports a Western plow when the white stuff flies.
2011 6.7 Lariat 4x4 CCSB CM/TM bed w/b&w turnover 285/65r20