2023 DEF concerns
Mountain Pass
Joined: Dec 2017
Posts: 142
Likes: 23
From: Southeast Wisconsin
For the first 4000 miles on my truck, I wasn't towing. Never really worried about DEF, as it used next to nothing.
Drove 2,000 miles with a 14k camper, and with my 48 gallon tank (long bed), I basically had to fill up the DEF every time I put fuel in to avoid the DEF warnings.
Now that I'm home, it's showing 700 miles of DEF range on 3/4 of a tank.
Drove 2,000 miles with a 14k camper, and with my 48 gallon tank (long bed), I basically had to fill up the DEF every time I put fuel in to avoid the DEF warnings.
Now that I'm home, it's showing 700 miles of DEF range on 3/4 of a tank.
Cross-Country
Joined: Jan 2022
Posts: 83
Likes: 26
What I’m noticing with my 2024 F450 is that is almost able to take care of the DPF passively. Seems to hover around 40%-60%. I did have one active regen and the truck smelled. :-) I was thinking it was the old Chevy in front of me driving through town, nope, it was me. On Monday I was at 23k GCW with a dump trailer and it went from 60% to 20% on one of my runs.
Mountain Pass
Joined: Jul 2023
Posts: 161
Likes: 81
From: So Cal...for now
My truck has 3,200 miles and has only hit 100% on the DPF twice causing a full-regen. However, it does seem to kick into regen at more regularly around 60% so it likes to stay in the 0-60% DPF range.
I just chucked 2.5 gallons of DEF into it yesterday in anticipation of towing our 5th wheel to Sedona, AZ, starting tomorrow morning (from the San Diego area). I wanted to make sure I didn't have any issues getting to our first fuel stop. I also put a spare jug of DEF in the bed just in case (I have a bed cover). When I checked before that, it still had 34% and 3,500 miles estimated DEF miles left which continues in its estimate of around 6500-7000 miles per tank unloaded. I suspect it will drop significantly on our trip to AZ.
I just chucked 2.5 gallons of DEF into it yesterday in anticipation of towing our 5th wheel to Sedona, AZ, starting tomorrow morning (from the San Diego area). I wanted to make sure I didn't have any issues getting to our first fuel stop. I also put a spare jug of DEF in the bed just in case (I have a bed cover). When I checked before that, it still had 34% and 3,500 miles estimated DEF miles left which continues in its estimate of around 6500-7000 miles per tank unloaded. I suspect it will drop significantly on our trip to AZ.
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Mountain Pass
Joined: May 2013
Posts: 202
Likes: 76
Bringing up a old topic. My DEF usage hasn't gotten any better. So for the naysayers. The increased DEF consumption is not caused by EGR or a mechanical issue. Ford technicians have not been able to resolve the issue, even though they don't think there is a issue, so Ford replaced my DEF injector to attempt a fix. One trip in and the consumption was worse. I took a look at the inside of the exhaust just downstream from the injector and found large chunks of crystalized DEF. They were still white, which leads me to believe they were fresh as everything else was covered in soot. This leads to the thought that the system is overdosing DEF and the exhaust gasses can't atomize all of the DEF. The crystalized particles even go back to the first filter plugging it up and causing the truck to perform regenerations to often. My DPF has never been more than 40% full when it does a regen, and even more often when towing. I will try to upload a picture.
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Mountain Pass
Joined: May 2013
Posts: 202
Likes: 76
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Lead Driver
Joined: Feb 2022
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Bad sensor maybe. The ONLY thing that triggers a DEF release is the NOX sensors, and to a lesser extent the EGT probes since it wont inject DEF unless the SCR is hot enough. If the NOX sensor is out of whack, it may think the SCR isn't cleaning it enough and injecting in more DEF than needed.
Only one way to know for sure and thats to have the IDS connected up, or third party scan tool that can measure and graph, and go on a long drive to measure the inputs and outputs and find out where the signals are getting mixed up.
DEF is called for when NOX levels exceed a certain percentage, then DEF is injected into a chamber that turns it into ammonia that then flows into the SCR converting NOX into CO2 and water. There should only be enough DEF to turn into ammonia gas, never flow past the chamber as a liquid and you are seeing with the crystals.
Only one way to know for sure and thats to have the IDS connected up, or third party scan tool that can measure and graph, and go on a long drive to measure the inputs and outputs and find out where the signals are getting mixed up.
DEF is called for when NOX levels exceed a certain percentage, then DEF is injected into a chamber that turns it into ammonia that then flows into the SCR converting NOX into CO2 and water. There should only be enough DEF to turn into ammonia gas, never flow past the chamber as a liquid and you are seeing with the crystals.
Thread Starter
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Mountain Pass
Joined: May 2013
Posts: 202
Likes: 76
Ford has been all over it. Even has a field service engineer involved. There are no codes, no nothing. It has been that way since new. Ford even suggested a buy back under lemon law. But because I reside in Georgia the lemon law applies to vehicles with a GVWR of 12000 pounds or less. No dual rear wheel truck qualifies. So they can build a complete lemon and get away with it. I love my truck. I just hope to help someone else with the same issues.
Cargo Master
Joined: Apr 2021
Posts: 2,019
Likes: 752
From: Texas
Bad sensor maybe. The ONLY thing that triggers a DEF release is the NOX sensors, and to a lesser extent the EGT probes since it wont inject DEF unless the SCR is hot enough. If the NOX sensor is out of whack, it may think the SCR isn't cleaning it enough and injecting in more DEF than needed.
Only one way to know for sure and thats to have the IDS connected up, or third party scan tool that can measure and graph, and go on a long drive to measure the inputs and outputs and find out where the signals are getting mixed up.
DEF is called for when NOX levels exceed a certain percentage, then DEF is injected into a chamber that turns it into ammonia that then flows into the SCR converting NOX into CO2 and water. There should only be enough DEF to turn into ammonia gas, never flow past the chamber as a liquid and you are seeing with the crystals.
Only one way to know for sure and thats to have the IDS connected up, or third party scan tool that can measure and graph, and go on a long drive to measure the inputs and outputs and find out where the signals are getting mixed up.
DEF is called for when NOX levels exceed a certain percentage, then DEF is injected into a chamber that turns it into ammonia that then flows into the SCR converting NOX into CO2 and water. There should only be enough DEF to turn into ammonia gas, never flow past the chamber as a liquid and you are seeing with the crystals.
get a co pilot hook up forscsn snd data log egr, definitely, all the sensors in the exhaust stream.
then save the data run
Have ford compare it to normsl...
My truck had egr rodent issues day one..Def was pouring through to solve the sensors going nuts
once egr lines, and wires got fixed the def is
Imo still high
6% used now in 200 miles...seems extremely
Truck reports 4999 Def dte..
I plan to give it to I clock 1k miles on odo
Then reset it full and daily document miles and def
My 21. Used it in a rate that got real close to 7500 miles per tank
not the less than 5k I see now
But i have the HOe. 6.7. And I am sure that requires different def usage.....maybe
Laughing Gas
Joined: Jan 2022
Posts: 779
Likes: 427
Just filled my '23 up with DEF, and it reads 2499 to empty. It drinks DEF like crazy. When towing, maybe 1,000 miles total to empty the DEF tank. It's the only thing I don't like about the truck. I keep hoping that as the 9th injector systems get some time on them, Ford will have a re-flash to dial in the DEF usage.
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Mountain Pass
Joined: May 2013
Posts: 202
Likes: 76
I tried to log the parameters. Ford could not provide me with the PIDs that would help. I even mentioned if the EGR was not performing as intended it would inject more DEF. Their response was that it would have a fault code. In their words, everything has a fault code. So, in my words, if there is no fault code, they (Ford) has no idea what to do.
Laughing Gas
Joined: Sep 2023
Posts: 801
Likes: 543
From: NE Ohio
Just filled my '23 up with DEF, and it reads 2499 to empty. It drinks DEF like crazy. When towing, maybe 1,000 miles total to empty the DEF tank. It's the only thing I don't like about the truck. I keep hoping that as the 9th injector systems get some time on them, Ford will have a re-flash to dial in the DEF usage.