Justin fackender
I have a 2019 f350 6.7 powerstroke 80k miles bone stock powertrain. I'm from Michigan and currently stuck in Florida. Truck went into limp mode and couldn't go over 50mph. I took it to a dealer down here and they said it's super common issue and they deal with it all the time. They put a new def pump, sending unit, wiring harness, and a few other sensors they said could cause it (all under warranty). After a few extended days of my vacation they told me the issue still wasn't solved. Next they tried to force a regen and also no luck, code never went away. They talked to ford and ordered me a whole damn pcm. It should be here in 2-3 more days but I've heard that this won't solve my issue. Looking for advice as to if the pcm could really fix it or what to do next to get me back home. Not looking to delete it just yet as I have 3 years of warranty left. Any advice or recommendations very appreciated.


Thank you!

 

probably have to replace the scr.

scr and dpf are one piece to that would mean a new dpf as well.

Did you check your air filter and put a new oem one on?

 

Yes, I've had the truck only 2 months and went over everything as soon as I got it, air filter included

 

That sucks... what kind of warranty was it? Seems to be the factory 100k mile warranty which unfortunately, does not cover the DPF unit.

Found this...

6.7L Power Stroke P207F DEF Quality Performance Diagnostics (expertswrite.net)

From there:

What causes P207F code on a 6.7L Power Stroke failures?

Generally when diagnosing any issues a technician will always look at things from the least intrusive to most intrusive OR from the least expensive to the most expensive to have the most efficent repair process.

1. Engine Air Filter: The cheapest fix for a P207F, Restricted air coming into the engine can cause unexpected air readings and combustion mixtures. Be sure to check to make sure the filter is clean and qaulity to OEM Ford FA-1902.
   
2. MAF Sensor: A dirty or damaged MAF sensor can cause unexpected air readings causing incorrect calculations. Try cleaning this sensor especially if you have KN&N filter.
   
3. Exhaust Leaks - Any leak in the exhaust can cause the NOx readings to be inconsistent. Leak in the exhaust before the turbocharger can also cause boost related concerns.
   
4. MAP Sensor - Sensor on top of the intake manifold becomes clogged up with carbon. Remove the sensor and lightly tap the carbon out and use a small pick to loosen the carbon.
   
5. EGR Valve - Clogged EGR coolers likely wont lead to P207F, however a sticking open EGR valve can. Use a scan tool to verify EGR_A_POS is less than 1v or at 0% when EGR_A_CMD is 0%.
   
6. DEF Fluid - DEF fluid has a expiration date and shelf life, it could be contaminated with other fluids, or even diluted with water. You can use a OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer to check.
   
7. NOx Sensor - These sensors age and become biased. While driving the truck you should monitor both NOx1 and NOx2. Simply put, NOx2 should remain less than NOx1. They both should warm up and respond in a timely manner. Sometimes the solution is to install a new NOx2 sensor.
   
8. Exhaust System Failure - A clogged particulate filter can cause issues however you generally get other codes confirming this. The SCR mixer or catalyst system could be damaged but this is a last resort because it is so expensive to replace.

 

I do have a aftermarket premium warranty, good till 3 years or 140 somethin k miles. Truck is still at dealer waiting for the pcm tomorrow or the next day. Hoping that does fix it