Mike B.

2011 pickup I dropped the exhaust and put a scope down the front and the DOC looks like it has a hole burned through it. I had a stuck open injector no.8 had to be dumping raw fuel before so I am guessing that's what it's from. Explains why EGT 1 was high during regen I would think?

Thank you for the reply Keith now I need to figure out why the temp is so high on EGT 1 during regen possible exhaust leak allowing too much oxygen in the exhaust possible cause of a 207F as well??

I read your thread I am diagnosing a P207F code

Question I noticed during your regen EGT1 is half the temp of 2 3 and 4 on regens all 4 of my temps run around 1200 is that normal?

I have a 2011 with a p207f I have been chasing I have 1 nox sensor and not even sure what the acceptable NOX reading supposed to be? How does the pcm know the scr is doing its job besides the nox sensor? What does is compare for ncce pid in mode 6?

I am trying to download this attachment and it won't let me

My maf is 19 g/s at idle and egr open drops to 11.5 g/s could the low number at idle be the result of a restriction or dirty air filter?

I did the manual regen and took the truck for the scr drive cycle 2 days in a row and the p207f has not popped yet. I did notice as the truck is driven and monitoring the nox numbers during acceleration the number climbs as it climbs the Def injector duty cycle does as well and it starts knocking the nox number down. I will continue to drive it and we will see what happens. Thank you gentlemen for responding to me and offering info and help I do appreciate it.

I had to order a refractometer to check the DEF fluid and it came out spot on 1.5 Oz came out and the spray pattern looked ok, first one I have done so just looking at it logically. I followed the pinpoint test up to the point of RD11,the nox sensor is changed, tomorrow I am going to do the scr system procedure drive and see what happens

I had noticed when I monitor the NOX pid at idle it's roughly 220ppm when I accelerate it jumps up to 900 and tapers back down to 250-300 ppm. I have been looking around other forums relating to NOX reading this is the only post that mentions it. I would guess those are bad numbers. I also noticed the def injector duty cycle is zero at idle and seems to correlate with acceleration. At idle is the catalyst supposed to take care of the NOX emissions without DEF?

A lot of great info in this post. My truck is a 2011 250 lariat 100k miles with p207f contaminated def fluid message. I am a Ford employee so I have access to tech site and IDS. What would I look at in the mode 6 data that would help me diagnose. I went through the pinpoint test and at the point in the test to change the catalyst. Its on my dime so I am cringing. Good info on monitoring the EGT sensors i was unaware of that sure wish there was a NOX sensor at the front.