Automatic Regen too often

[Units]

Can the truck sense the change in (good) performance and adjust its parameters to go back to its old ways?

The ultimate way to get you to go back to the dealership service department

 

[OLEJOE]

I know you hit the interstate on your commute, have you tried a good hard acceleration to get up to speed after getting off the interstate? That seems to help my DPF % jump back down.
Just a thought.

I have noticed just the opposite of your experience. If I have to stand on it a little it goes up. If I have been running it pretty hard and let off it drops. I don’t know if the temperature in the DPF goes up momentarily because of lack of air flow or what. I was impressed with how quick it cleared the DPF towing with 1.5 oz per 10 gallon of the 6500.

 

[CFE]

A few days ago, I got the P2459 - regen frequency CEL. Just rolled over 50k on my 22' 3500. Seems like this isn't an isolated issue with these trucks

 

[OLEJOE]

A few days ago, I got the P2459 - regen frequency CEL. Just rolled over 50k on my 22' 3500. Seems like this isn't an isolated issue with these trucks

Unfortunately not.

 

[Units]

I have noticed just the opposite of your experience. If I have to stand on it a little it goes up. If I have been running it pretty hard and let off it drops. I don’t know if the temperature in the DPF goes up momentarily because of lack of air flow or what. I was impressed with how quick it cleared the DPF towing with 1.5 oz per 10 gallon of the 6500.

I don’t have any way to monitor EGTs. I just assumed that the sudden increase in pressure/airflow from stepping on the gas after a good 80mph run was just blowing out the crap accumulated from the passive regen. It’s got to tie in to airflow and sensor readings since it will jump up real quick once I hit the interstate at a high speed with increased air flow. While driving slow around town it will build but it takes a long time.

 

[OLEJOE]

I don’t have any way to monitor EGTs. I just assumed that the sudden increase in pressure/airflow from stepping on the gas after a good 80mph run was just blowing out the crap accumulated from the passive regen. It’s got to tie in to airflow and sensor readings since it will jump up real quick once I hit the interstate at a high speed with increased air flow. While driving slow around town it will build but it takes a long time.

I think it is the pressure differential. The higher the pressure on the front side, the more difference there is between the two. I have noticed when I run mine hard, it reads higher and the next morning when I crank it the gauge will be lower but jumps back up to where it was when I get back on the highway.
But I made it over 500 miles of stop and go, in town, short trips and short (15-20 mile) interstate runs before the gauge ever moved off of zero. Some idling too since I got my remote start activated.

 

[CFE]

Unfortunately not.

So what seems to be the solution (there's 50 pages of comments, which I'll read later) for this issue or is there even a solid remedy (I've seen a few repeat offenders after having the DPF sensor replaced)?

 

[mbarber84]

I know you hit the interstate on your commute, have you tried a good hard acceleration to get up to speed after getting off the interstate? That seems to help my DPF % jump back down.
Just a thought.

I try not to perform a bunch of abrupt throttle changes as that should, if anything, increase soot load rather than reducing it. Usually the load on the engine encountering grades is what will achieve good passive regeneration. A good hard acceleration doesn’t really achieve high enough EGT’s for long enough to be effective at removing any significant soot. Or at least not with my truck it doesn’t. I try to avoid Aggressive throttle inputs and instead ease the fuel in

 

[pherring]

I know this has been beat to death but I can’t find a good answer to this other than “drive it harder”. I have a 2022 Ram 2500 with a Cummins (not high output) at roughly 8500 miles I got the regen too often code and my mileage dropped from roughly 17 average to 14, took it to the dealer and they said I need to drive it harder. At this point my towing miles were at 2,000 miles so I’m towing 9k lbs 25% of the time. I know that’s not a lot.

At 9,00 miles (500 miles later) my mpg is down to 12.6 and I get another regents too often code. Back to the dealer and they tell me ”you need to drive it harder” they do the manual regen and send me on my way.

Now I start tracking my auto regen from the dpf screen, I leave the dealer still in auto regen, put 363 miles on the truck at highway speeds up and down canyons, auto regen finally shuts off…. For 22 miles, truck goes back into auto regen, I have 263 miles since then and the truck is still in auto regen. That 263 miles is me flooring it from every stop light and averaging roughly 90mph on the Highway, hitting 102 at times which apparently is the top speed for the truck. Around 150 miles into this regen I hooked a 4k lbs trailer to the truck and started just driving around with that trailer connected to try and get it out of regen. Mileage is still at 12.8ish.

Called the dealer last night and they said all they can do is put it in manual regen in the parking lot. They tell me they have one other person with this problem and that it’s my driving habits. At this point I’m calling BS, I have about 20 diesel trucks in my parking lot at work, most these guys live within 20 miles of this place and pretty much all of them still have brand new hitches on their trucks, all of them that I talk to either tow smaller trailers than I do, or less often or not at all. I’m having a hard time believing it’s my driving habits when 25% of my miles are towing and only one other customer has this problem. Has anyone else found a fix for this? Thanks!

I have a 23 3500 HO and having the same issues and told need to drive it harder that the truck is not designed to just get in and drive to town and i call BS as well I have been to the dealer 5 times in the last few months. Pulling my trailer on the highway or not milage down to 8.9 I have it at another dealer now after a 2000 mile trip engine light is back on for the last 800 miles regen frequency. I believe it is a program issue or bad sensors on the filter? I hope someone can fix our issues the average regen takes anywhere from 50 to 80 miles and goes right back into regen

 

[mbarber84]

A few days ago, I got the P2459 - regen frequency CEL. Just rolled over 50k on my 22' 3500. Seems like this isn't an isolated issue with these trucks

It’s definitely not an isolated issue.
When I canvas audiences in two forums and three Facebook groups and 70% of the trucks responding with regen frequency issues are 2022’s…..there’s nothing coincidental about it.

 

[mbarber84]

I have a 23 3500 HO and having the same issues and told need to drive it harder that the truck is not designed to just get in and drive to town and i call BS as well I have been to the dealer 5 times in the last few months. Pulling my trailer on the highway or not milage down to 8.9 I have it at another dealer now after a 2000 mile trip engine light is back on for the last 800 miles regen frequency. I believe it is a program issue or bad sensors on the filter? I hope someone can fix our issues the average regen takes anywhere from 50 to 80 miles and goes right back into regen

If you’re averaging 8.9 mpg not towing, I’d suspect you have a severe issue. Are you monitoring how frequently your truck regenerates? Has the truck triggered the P2459 DTC yet?

 

[CFE]

It’s definitely not an isolated issue.
When I canvas audiences in two forums and three Facebook groups and 70% of the trucks responding with regen frequency issues are 2022’s…..there’s nothing coincidental about it.

I avoided the aisin transmission/k1 issue, only to have this slap me in the face. I saw your comment about someone having the ground isolation wire relocated - any update on that guys truck? Just trying to figure out what the potential solution can be before I make an appt at the local Ram dealer.

 

[mbarber84]

I avoided the aisin transmission/k1 issue, only to have this slap me in the face. I saw your comment about someone having the ground isolation wire relocated - any update on that guys truck? Just trying to figure out what the potential solution can be before I make an appt at the local Ram dealer.

Jury’s still out on the k1 issues. Added two trucks recently that both had failures over 100k miles so that pushes the hypothetical “safe” margin way out.

I spoke with the guy who had the ground wire moved. As of yesterday he said that the truck was acting weird and that he wasn’t sure that fixed it. He’s supposed to update me when he gets back from a road trip with the truck

 

[Units]

I try not to perform a bunch of abrupt throttle changes as that should, if anything, increase soot load rather than reducing it. Usually the load on the engine encountering grades is what will achieve good passive regeneration. A good hard acceleration doesn’t really achieve high enough EGT’s for long enough to be effective at removing any significant soot. Or at least not with my truck it doesn’t. I try to avoid Aggressive throttle inputs and instead ease the fuel in

I’m talking after a good interstate run and you’ve had some passive regen occur. I don’t red light race, I’m easy on my truck so as not to create any excessive soot. Plus, I want my truck to last for a while. I’ve seen someone else mention this and how it worked for them which is what made me try it.
@joshuaeb09 i believe has mentioned doing this.

 

[TomTom]

I’m talking after a good interstate run and you’ve had some passive regen occur. I don’t red light race, I’m easy on my truck so as not to create any excessive soot. Plus, I want my truck to last for a while. I’ve seen someone else mention this and how it worked for them which is what made me try it.
@joshuaeb09 i believe has mentioned doing this.

Units, I have the exact same experience you have. If my truck has been running for a while (usually 30-45min, but can be less) if I step on the gas and really get it going the DPF% will drop dramatically...it can drop 5% per pedal stomp. Sometimes I use this just to clear 5-10% before I get to my house from the highway. I find this behavior of the truck very off though.

 

[TomTom]

Units, I have the exact same experience you have. If my truck has been running for a while (usually 30-45min, but can be less) if I step on the gas and really get it going the DPF% will drop dramatically...it can drop 5% per pedal stomp. Sometimes I use this just to clear 5-10% before I get to my house from the highway. I find this behavior of the truck very off though.

The only thing that make sense in my head is that somehow after driving long enough to get it nice and hot, the sensor is finally starting to read the difference in pressure correctly and by forcing a lot of air through the dpf, it causes the computer to recalculate the % full? That, or there is some physical blockage that starts to open in higher heat and then can allow air through when there is a big rush of it? I have no idea....this really confounds me, but also what made me hopeful about the sensor ground wire...maybe there is an issue there.

 

[OLEJOE]

I have a 23 3500 HO and having the same issues and told need to drive it harder that the truck is not designed to just get in and drive to town and i call BS as well I have been to the dealer 5 times in the last few months. Pulling my trailer on the highway or not milage down to 8.9 I have it at another dealer now after a 2000 mile trip engine light is back on for the last 800 miles regen frequency. I believe it is a program issue or bad sensors on the filter? I hope someone can fix our issues the average regen takes anywhere from 50 to 80 miles and goes right back into regen

Have you checked to make sure it’s not making oil or raising the oil level ?

 

[pherring]

If you’re averaging 8.9 mpg not towing, I’d suspect you have a severe issue. Are you monitoring how frequently your truck regenerates? Has the truck triggered the P2459 DTC yet?

8.9 is pulling my trailer without the trailer we are getting 12.6 and yes on the code 5 times and they are unable to diagnose the issue just keep clearing it and why I have opted to go to another dealer

 

[OLEJOE]

So what seems to be the solution (there's 50 pages of comments, which I'll read later) for this issue or is there even a solid remedy (I've seen a few repeat offenders after having the DPF sensor replaced)?

There doesn’t seem to be a one fix fixes all. It could be anything from the air filter to the DPF and anywhere in between. The only commonality any have had is staying away from biodiesel as much as possible and using the Archoil fuel additive. Your truck sounds like it could be a charge air leak or EGR malfunctioning. The only way to know for sure is check everything between the air filter and the outlet to the DPF. All sensors and connections and the turbo for oil leaking into the exhaust. And the CCV filter.

 

[mbarber84]

I’m talking after a good interstate run and you’ve had some passive regen occur. I don’t red light race, I’m easy on my truck so as not to create any excessive soot. Plus, I want my truck to last for a while. I’ve seen someone else mention this and how it worked for them which is what made me try it.
@joshuaeb09 i believe has mentioned doing this.

My truck sees almost exclusively interstate runs, some of which include long accelerations as well as varying grades. I really wish I could say the passive regeneration was consistent but it seems to be anything but.