So, what does the new EPA law mean for future Diesels? Will the 2026+ be deleted from the factory?

[Dodgeman]

Would/could buy margin on additional failures:

1) Upstream NOx sensor
2) Downstream NOx sensor
3) DEF Pump (module)
4) DEF quality sensor (module?)
5) DEF heater (module)
6) EGT 4
7) EGT 5
8) DEF level sensor (module)

Any more?

As a DIYer, the ability to continue my trip, get home, get camper parked, and then source a reasonably priced replacement part is a huge advantage over being far from home and being at the mercy of whatever diesel performance shop that has their own bills to pay.

FWIW, I carry a spare DPF injector in the truck, but NOx sensors and module are kinda pricey.

Hmmm, I guess you could technically say that the 2025+ trucks have a “DPF injector”. However, I think you are probably meaning a DEF injector.

 

[johnmyster]

Hmmm, I guess you could technically say that the 2025+ trucks have a “DPF injector”. However, I think you are probably meaning a DEF injector.

Rats, I made the mistake I make fun of others for. (Errantly swapping DEF for DPF.) Yes, I carry a DEF injector.

I think "indirect injector" or "hydrocarbon doser" would be the accepted terms for the other thing.

 

[mboudoin]

Would/could buy margin on additional failures:

1) Upstream NOx sensor
2) Downstream NOx sensor
3) DEF Pump (module)
4) DEF quality sensor (module?)
5) DEF heater (module)
6) EGT 4
7) EGT 5
8) DEF level sensor (module)

Any more?

As a DIYer, the ability to continue my trip, get home, get camper parked, and then source a reasonably priced replacement part is a huge advantage over being far from home and being at the mercy of whatever diesel performance shop that has their own bills to pay.

FWIW, I carry a spare DPF injector in the truck, but NOx sensors and module are kinda pricey.

I am kind of in the same boat. I would like to put together a go box with the appropriate items that fail within like 60k miles. Things like the DEF injector/DPF filter/CCV filter etc...

 

[jkempken]

I really don't see anything to get all excited about here. In hundreds of thousands of miles I have never let my DEF run out so derating has not been an issue. DEF injector nozzle failure, while a possibility, affects only a small percentage of owners. Increasing the time/miles allowed to get to a repair facility in the event of such a failure is only a stroke of intelligence that can potentially lower the stress level of an already bad situation.
Since we can already drive without fear of derating when the tank is frozen, it seems a small step to increase the distance/time available to correct a "no DEF situation".

This is actually a pretty big deal, I have experienced it first hand on a snowmobiling trip this past winter. Was super cold and had tank about 3/4 full of DEF, def froze for a couple of days then it got warmer out to thaw it out and got passed the 39 degree mark to allow the faults to set. When the def Froze it got def crystals on the DEF ultrasonic sensor so the sensor would not work. I kept the def tank topped up at every stop cause the level was still going down according to the indicator on the dash. Once in the middle of North Dakota at about 2 am in the morning I got the derate in 200 miles message. Luckily were were about 150 miles from a dealer in Bismarck so we went there and waited the several hours for them to open and get us in. Luckily they had one sensor left and were able to replace it under warranty, if they did not have that sensor and were unable to clean it me and my three friends would have been stranded in Bismark for who knows how long and missed out on our trip. If the derate takes 4k miles or 40 hours that would have left us enough time to get to our destination and then deal with it the next week were were there instead of potentially stranded. You also need to think about the people that live far from dealers, how are they able to get the vehicle there in 200 miles after getting home and dropping of a trailer or family.

 

[sstoner911]

This is actually a pretty big deal, I have experienced it first hand on a snowmobiling trip this past winter. Was super cold and had tank about 3/4 full of DEF, def froze for a couple of days then it got warmer out to thaw it out and got passed the 39 degree mark to allow the faults to set. When the def Froze it got def crystals on the DEF ultrasonic sensor so the sensor would not work. I kept the def tank topped up at every stop cause the level was still going down according to the indicator on the dash. Once in the middle of North Dakota at about 2 am in the morning I got the derate in 200 miles message. Luckily were were about 150 miles from a dealer in Bismarck so we went there and waited the several hours for them to open and get us in. Luckily they had one sensor left and were able to replace it under warranty, if they did not have that sensor and were unable to clean it me and my three friends would have been stranded in Bismark for who knows how long and missed out on our trip. If the derate takes 4k miles or 40 hours that would have left us enough time to get to our destination and then deal with it the next week were were there instead of potentially stranded. You also need to think about the people that live far from dealers, how are they able to get the vehicle there in 200 miles after getting home and dropping of a trailer or family.

Yes, its not really an issue of just " running out" of DEF, its when the system throws a code even if you have a full tank of DEF and is going to strand you. I had one experience with the DEF derate but it was a self inflicted wound - i accidentally left the fuse out for the system that checks the DEF quality when looking for a fuse to tap for a light bar.

The feeling of being stranded is not a good one.