Wholeo
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I had a P1451 code stored, took the truck to the dealer, they said can't find no problem.No code = no problem.
I had a P1451 code stored, took the truck to the dealer, they said can't find no problem.No code = no problem.
My suspicion / prediction is that this TSB will get expanded / revised as time moves forward. The DPF replacement has been attempted multiple times on multiple trucks and only has a marginal success rate at best. The problem lies deeper. Software, tuning, calibration, etc.Possible fix if anyone is having issues with their dealers still, TSB - 25-005-24 dated September 27, 2024. Have your dealers check, and if you’re having this issue and you’re within the warranty they will replace DPF.
They'll have it solved just about the time everyone's emissions warranty expires.My suspicion / prediction is that this TSB will get expanded / revised as time moves forward. The DPF replacement has been attempted multiple times on multiple trucks and only has a marginal success rate at best. The problem lies deeper. Software, tuning, calibration, etc.
I think that is the goal cost mitigation and no concern with a proper resolution. Notice the usual RamCares response is staying away from this thread.They'll have it solved just about the time everyone's emissions warranty expires.
This.I think that is the goal cost mitigation and no concern with a proper resolution. Notice the usual RamCares response is staying away from this thread.
With cooler temps (below 60 or so) i see no soot load and on longer drives good passive regen. a soon as temps are over 65 mid day I see soot loading. This has me believing it has to due with the tuning of the system. However, I believe they do not want to invest in testing and tuning to correct this and rather throw parts at people that pay attention to their trucks (small minority in the grand scheme of production).
I do wonder and may reach out to PPEI or Calibrated ( Kory of PPEI claims he can emission delete tune cleaner than factory emission tune) to see if it may resolve by running a custom tune. Those with emission compliant tunes I would love to hear what they are experiencing with the tunes and regen rates.
Mine will start getting in the EGT range to start passive regens and then the EGT’s will drop back to less than 600*. EGR percentage running 74-75% at times going down the road. I thought that was what DEF was for.This.
Sounds like my truck pretty much exactly.
Cold weather it runs clean, produces little soot, passive regeneration happens easily, all regens at 24 hours.
Soon as the temps go up the truck runs filthy and can’t go more than 8-10 or so engine hours before it regenerates.
It has to be a tune / software issue where the truck isn’t adjusting to conditions adequately. The intake should be able to flow more than enough air. Yes cold air is denser but it’s hard for me to understand why the truck can’t adjust to be cleaner. I can’t imagine they want these trucks running that inefficiently. Could also be the amount of EGR being dosed in and when. The EGR dampens temps and makes passive regen harder to achieve due to the lower EGT’s.
Mine will start getting in the EGT range to start passive regens and then the EGT’s will drop back to less than 600*. EGR percentage running 74-75% at times going down the road. I thought that was what DEF was for.
I think their EGR strategy is what is causing the problems. I also think that the delete devices that the EPA claimed Cummins had implemented on these trucks was the DEF/SCR system to be able to reduce the amount of EGR required to reduce NOX emissions.
I honestly doubt anything improved from 22 to 24. If it's a tune problem as many suspect then a code patch or update would solve the problem assuming the code was fixed for newer model years. If it is a defective component within these trucks then I'd think things like this thread or even just talking with technicians would show a common theme as to what exactly the problem component is. However, it seems to be throwing parts at the truck to make it go away (for now) is their answer while simply hoping we all age out of warranty. Unless or until something notable changes, I am not convinced any new model years will be differentDon't buy a 22, they fail and the manufacturer does not stand behind them....I bought a new 22 in June of 23. 4 trips to the dealer, including a dpf recall, replacement of dpf sensor, dpf filter assembly, and fuel rail actuator - all same problem within a year and under 13k. Took back to original dealer who made me an ok deal on a new 24 rebel 2500 diesel. Stellantis/FCA, after the fact offered some unknown incentive that they would not honor as I purchased the new vehicle - taking a bath on the old POS - prior to them deciding that they would do something. if you have one and it is under warrant and you have the opportunity and time available, use lemon laws and sue the living crap outta them. I could not as I had purchased a vehicle. I hope this new truck does well as I really do like it, but either way, due to their lack of actual customer support, I will not buy another stellantis product...
I think your right and I think Ram is researching a resolution to the problem! Once the determination is made, correcting it where all the hardware/software seamlessly functions together I believe is very time consuming. After the CP4 pump failure resulted in the Y78 recall to the new CP3.3 pump, several 2019's experienced problems after pumps and software programming updates were preformed. The issue turned out that 2019's that had the VB6 emissions and several other software recall updates prior to the pump replacement, those software updates and the new CP3.3 software update didn't play nice together. So for those who's 19's had those recall updates, they were put on hold for another 8-12 months while new software was being developed to resolve the problem. I was one of those folks who had to wait, luckily I never had an issue with the CP4 while waiting!Have to keep in mind that there a multitude of different components and systems that are tied together when it comes to DPF regeneration. A failure in any one of these systems is enough to cause issues, and it isn’t always easy to diagnose / find them. There can also be instances where there are issues with more than one aspect of this system and that makes it even more difficult. I don’t think there will be a one-size-fits-all solution to this problem. That being said, tuning and software are at the root of how it operates and that aspect definitely needs to be reviewed closer.
Does your truck fall under the build dates listed for TSB 25-005-24 for DPF regen frequency?My 22 worked flawlessly up until about 27k miles. My dpg gauge never got barely over the 1/4 mark and only did the std 24hr regen. Now it’s been doing regens way too frequently. Here are my last 3 regens, it’s been doing this longer but I just started taking pictures and logging.
10-7-24 / 30,251 miles / idle 82 / drive 562
10-11-24 / 30,481 miles / idle 82 / drive 566
10-15-24 / 30,840 miles / idle 83 / drive 572
So you can see it made it a whopping 230 miles and 4 engine hours between regens. Then the Regen on 10-11-24 was right after we left the house with the camper last Friday. Of the 359 miles between the next Regen 321 of those was pulling our 7,500lb camper. The dpf gauge was at 0 when we got back on Sunday. By the time I made my 38 mile drive to work yesterday the dpf gauge was just under half full.
Speaking of the TSB, I hope they broaden the build dates and loosen the parameters for replacement. Even if experiencing problems, you have to have a check engine light set and in limp mode because of it or the threat of power reduction (can’t remember which off the top of my head) before they will even apply it.Does your truck fall under the build dates listed for TSB 25-005-24 for DPF regen frequency?
I haven’t checked but I will. But for now I have had no CEL’s come on. I spoke with the dealer this morning and I’m going to bring it in after we get back from a trip this weekend. He said they can scan it to see if there are any codes stored. If not there is nothing they can do. If that ends up being the case I’m just going to put my truck on a diet. I intended to do this if and when something happened I just didn’t expect it this soon. But that would still be cheaper than taking a loss and getting into something else.Does your truck fall under the build dates listed for TSB 25-005-24 for DPF regen frequency?
probably a band-aid until the ecm flash to actually fix the issue is approved by the epa.I’m also not 100% sure that will even fix things since there are members that have had a new DPF just for the issues to return.