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Symptoms of bad DPF Sensor? 100% full suddenly and nothing on CTS Edge 3?

I have similar problems. My truck is doing regen every 50 miles or so. when I copnnected OBD fusion app it showed that I have these two codes below:
  • P2459 - Particulate Filter Regeneration Frequency Bank 1
  • P20EE - SCR NOx Catalyst Efficiency Below Threshold Bank 1 Catalyst 1

What strange is that I didn't see this codes on ALfaOBD, on another scanner that my friend had and at dealership.

My new filter is on order and I am waiting to install it. Another interesting fact is that on OBD Fusion app I see 0s for DPF inlet pressure sensor, but see values on outlet sensor. I am not sure if my sensor is bad or I am reading it in wrong place.
 

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rauan said:
What is also notable, the DPF pressure delta shows the values very close to outlet pressure values.
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Normal operation, Delta is the difference between front and rear. The rear will have a higher pressure reading than the front. Delta is all you really need to monitor.
 
AH64ID said:
Normal operation, Delta is the difference between front and rear. The rear will have a higher pressure reading than the front. Delta is all you really need to monitor.
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I am not sure I understand what you are saying. I would expect that rear will read less, not more. The pressure source is coming from engine exhaust in front side of the pipes and as the gasses pass through the components they lose pressure on each stage and on exit would equal to atmospheric pressure.
What I suspected is since I can’t see pressure for inlet and if the sensor is faulty then the module calculates the delta between the two and showing outlet pressure without negative sign.
Units, can you check what you see for delta?
 
rauan said:
I am not sure I understand what you are saying. I would expect that rear will read less, not more. The pressure source is coming from engine exhaust in front side of the pipes and as the gasses pass through the components they lose pressure on each stage and on exit would equal to atmospheric pressure.
What I suspected is since I can’t see pressure for inlet and if the sensor is faulty then the module calculates the delta between the two and showing outlet pressure without negative sign.
Units, can you check what you see for delta?
Click to expand...

Sorry, was reading in the sun and talking to text. Should just focus on one thing...

Soot buildup will create the higher pressure up front, the 1.9 delta seems normal thou depending on rpms, soot, etc. Engine off should be a psid of 0.0, or very close.

If the sensor was faulty you would get a code.

Exit pressure won't be ambient thou, unless the truck is off.

Delta pressure is all I'd really monitor. I couldn't tell you if the PID for inlet and outlet pressure even report accurate. There are some PID's that just don't report accurate, or some readers don't report them accurate.
 
Units said:
I use the MX+ and was seeing the same thing. Maybe someone that knows will chime in.
View attachment 88932
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Mine too! With torque pro. My 2022 DPF was warranty replaced early in its life due glue stripe issue. Before this dealer knew anything about that. Ordered the 530... a/f and was given the succeeding part number (?685....) with the glue stripe and we were off to the regen races. The only thing that's helped me in the last 3.5 years had been arch oil raising temps. I can get about 300miles between regens now, but never the 600-800 miles from when the truck was new (including after dealer replaced the DPF. I'm sure, when new, I was seeing 24 hour regens. Never get that far anymore. I also questioned whether that inlet px sensor might be just hanging loose and not reinstalled by the truck following replacement and thus at ambient atmospheric pressure and reading zero. Someday, I'll look, when I don't have to roll around in the snow.

I've had no codes since the replacement but also question if this is a programming issue since the 2022s seem most prone to frequent regens. The software should be able to adjust for the slight difference of those thin glue stripes.
 
It's not just the 22's, they just seem to be the most prevalent year with issues. My '24 has been aggravating. I haven't had it to the dealer yet, it hasn't thrown any codes yet, but I've been closely monitoring and managing the soot load issue since purchasing it with about 11k mi on it. It did have high idle hours (35% total). I've replaced air filter with the correct one, I've been running Archoil. I have run a bottle of Rislone DPF cleaner. The Archoil seems to help but we only haul on the weekends and I have a short commute to work (12 miles or so). I bought a CTS3 early on so i can monitor EGT's. 650 seems to be the magic number for passive regen. I've had the truck for almost a year now. It's been great otherwise. But if we haul horses on Saturday, it will typically passively burn off the DPF and all is great. By Thursday morning later that week my DPF gauge on the EVIC is starting to climb. I work right off I-75 so I usually will spend my lunch hour running down 75 and back for about 40 minutes to burn the soot and the gauge is usually back to zero. If I don't do this, it will regen every week, ever 150-200 miles, and I know I'll eventually get the dreaded excessive regen code and then I'm really inconvenienced as I don't have another tow pig to haul our gooseneck horse trailer. I haven't decided what I'm going to do long term. The cost of a delete is astronomical and I'd be basically tossing my warranty. I could switch brands but no guarantee that I wouldn't be dealing with similar issues with another. So I just keep doing what I'm doing. I don't think going to a gasser is a good option as I know I won't be happy with the towing performance and longer 6 hour trips would be miserable. Our horse trailer is a high end full living quarters 3-horse, 8' wide with all solid oak cabinets so it's a pig. Had to add bags to prevent excessive squat.

I wish Ram would have more competent techs that could diagnose and correct these issues and am quite sick of tards on the internet just saying "delete" it. I spent a fortune on this truck, I shouldn't HAVE to. The expectation is it should be running without these issues at least until the warranty expires.
 
Bret said:
It's not just the 22's, they just seem to be the most prevalent year with issues. My '24 has been aggravating. I haven't had it to the dealer yet, it hasn't thrown any codes yet, but I've been closely monitoring and managing the soot load issue since purchasing it with about 11k mi on it. It did have high idle hours (35% total). I've replaced air filter with the correct one, I've been running Archoil. I have run a bottle of Rislone DPF cleaner. The Archoil seems to help but we only haul on the weekends and I have a short commute to work (12 miles or so). I bought a CTS3 early on so i can monitor EGT's. 650 seems to be the magic number for passive regen. I've had the truck for almost a year now. It's been great otherwise. But if we haul horses on Saturday, it will typically passively burn off the DPF and all is great. By Thursday morning later that week my DPF gauge on the EVIC is starting to climb. I work right off I-75 so I usually will spend my lunch hour running down 75 and back for about 40 minutes to burn the soot and the gauge is usually back to zero. If I don't do this, it will regen every week, ever 150-200 miles, and I know I'll eventually get the dreaded excessive regen code and then I'm really inconvenienced as I don't have another tow pig to haul our gooseneck horse trailer. I haven't decided what I'm going to do long term. The cost of a delete is astronomical and I'd be basically tossing my warranty. I could switch brands but no guarantee that I wouldn't be dealing with similar issues with another. So I just keep doing what I'm doing. I don't think going to a gasser is a good option as I know I won't be happy with the towing performance and longer 6 hour trips would be miserable. Our horse trailer is a high end full living quarters 3-horse, 8' wide with all solid oak cabinets so it's a pig. Had to add bags to prevent excessive squat.

I wish Ram would have more competent techs that could diagnose and correct these issues and am quite sick of tards on the internet just saying "delete" it. I spent a fortune on this truck, I shouldn't HAVE to. The expectation is it should be running without these issues at least until the warranty expires.
Click to expand...
I drive right at 27 miles to work one way with 20 of it on the interstate @80mph. I don’t tow any till I’m hooked up to our TT. My drive is right on the cusp of not quite being far enough and plenty far enough for decent passive regen. My truck builds soot up but at a slow pace, I currently average right at 450 miles before an active Regen. If I take a few trips to Lowe’s on the weekend it’s less than my average. Only way I have found, without towing, is to unfortunately get some good highway time in. Maybe add a little bit of extra highway time before and after work while you Dpf is good and hot, that way you won’t be burning up your lunch time.
 
Bret said:
It's not just the 22's, they just seem to be the most prevalent year with issues. My '24 has been aggravating. I haven't had it to the dealer yet, it hasn't thrown any codes yet, but I've been closely monitoring and managing the soot load issue since purchasing it with about 11k mi on it. It did have high idle hours (35% total). I've replaced air filter with the correct one, I've been running Archoil. I have run a bottle of Rislone DPF cleaner. The Archoil seems to help but we only haul on the weekends and I have a short commute to work (12 miles or so). I bought a CTS3 early on so i can monitor EGT's. 650 seems to be the magic number for passive regen. I've had the truck for almost a year now. It's been great otherwise. But if we haul horses on Saturday, it will typically passively burn off the DPF and all is great. By Thursday morning later that week my DPF gauge on the EVIC is starting to climb. I work right off I-75 so I usually will spend my lunch hour running down 75 and back for about 40 minutes to burn the soot and the gauge is usually back to zero. If I don't do this, it will regen every week, ever 150-200 miles, and I know I'll eventually get the dreaded excessive regen code and then I'm really inconvenienced as I don't have another tow pig to haul our gooseneck horse trailer. I haven't decided what I'm going to do long term. The cost of a delete is astronomical and I'd be basically tossing my warranty. I could switch brands but no guarantee that I wouldn't be dealing with similar issues with another. So I just keep doing what I'm doing. I don't think going to a gasser is a good option as I know I won't be happy with the towing performance and longer 6 hour trips would be miserable. Our horse trailer is a high end full living quarters 3-horse, 8' wide with all solid oak cabinets so it's a pig. Had to add bags to prevent excessive squat.

I wish Ram would have more competent techs that could diagnose and correct these issues and am quite sick of tards on the internet just saying "delete" it. I spent a fortune on this truck, I shouldn't HAVE to. The expectation is it should be running without these issues at least until the warranty expires.
Click to expand...
I’m not sure how many miles are on your rig, but I’m willing to wager that you are closer to, or have exceeded the warranty period on the DPF.

They are warrantied for a pathetic 5yr/50k.
 
31,586 as of last regen. I take pictures of the mileage and "Automatic Regeneration in Progress" so i can track exactly how many miles between them.
 
Bret said:
31,586 as of last regen. I take pictures of the mileage and "Automatic Regeneration in Progress" so i can track exactly how many miles between them.
Click to expand...
Miles aren’t nearly as important to monitor as engine hours, FWIW.
 
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