Edge CTS3 Regen % Soot

[Leadchuncker]

Can someone explain what the Regen % Soot is reading ?
I thought it was reading the amount of soot in the dpf but I’m not sure about that now.
Today running 80mph down the interstate it was on 45%, parked for 20 minutes, fire it back up and it’s at 15%, drive 3 miles and it’s up to 30%
The truck DPF gauge is at 0

Yesterday I had an active regen at 475 miles / 700 minutes by the CTS3. The edge never went to 0 but 27% and in 10 miles it was up to 50% and the truck gauge was at 25%
This morning when I left out the edge was on 30% and in a few miles the truck gauge went from 25% to 0
I’m a little confused at this point..

 

[AH64ID]

100% means the truck needs to regen. That can be based on time, 24 hours max, or it can be based on soot loading. It’s a % of regen, not of soot loading. Even if a regen is due for soot loading the DPF won’t be at 100% on the dash since the truck regens for loading at around 45-47% DPF loaded.

The reason it goes from 45% to 15% is because it’s using soot loading to determine the %, meaning the soot loading is more than the time to regen. When driving and the soot loading is low the ECM has a harder time knowing the exact soot loading based on varying temps and flow thru the DPF so it estimates high (~45% is what I commonly see too), but when you restart it the next morning it gets a much more accurate delta pressure in the DPF and thus the more accurate reading at 15%. It will then climb based on driving style, time, loading, etc. The lower number will slowly start to climb based on engine hours. Every ~14 minutes is a 1% minimum increase.

You could think of two scales going on, one is soot loading and one is time to regen. The CTS3 is showing the higher of those two numbers. It can go back and forth between the two scales at anytime, which is why the percent sometimes bounces at lower numbers.

I find that under 50% on the CTS3 is jumping back and forth between time and soot loading. Above 50% is normally driven by time and more stable. That’s with a driving style that goes the full 24 hours between regens. If your driving style needs more frequent regens then the CTS % is going to be based on that.

As far as the miles and time for regen that the CTS3 displays I would ignore it. I’ve never seen it accurate and mine shows 0’s for both right now. It’s pretty useless.

 

[Leadchuncker]

100% means the truck needs to regen. That can be based on time, 24 hours max, or it can be based on soot loading. It’s a % of regen, not of soot loading. Even if a regen is due for soot loading the DPF won’t be at 100% on the dash since the truck regens for loading at around 45-47% DPF loaded.

The reason it goes from 45% to 15% is because it’s using soot loading to determine the %, meaning the soot loading is more than the time to regen. When driving and the soot loading is low the ECM has a harder time knowing the exact soot loading based on varying temps and flow thru the DPF so it estimates high (~45% is what I commonly see too), but when you restart it the next morning it gets a much more accurate delta pressure in the DPF and thus the more accurate reading at 15%. It will then climb based on driving style, time, loading, etc. The lower number will slowly start to climb based on engine hours. Every ~14 minutes is a 1% minimum increase.

You could think of two scales going on, one is soot loading and one is time to regen. The CTS3 is showing the higher of those two numbers. It can go back and forth between the two scales at anytime, which is why the percent sometimes bounces at lower numbers.

I find that under 50% on the CTS3 is jumping back and forth between time and soot loading. Above 50% is normally driven by time and more stable. That’s with a driving style that goes the full 24 hours between regens. If your driving style needs more frequent regens then the CTS % is going to be based on that.

As far as the miles and time for regen that the CTS3 displays I would ignore it. I’ve never seen it accurate and mine shows 0’s for both right now. It’s pretty useless.

Can’t remember if I told you or not … A mopar mechanic told me that the only solution to frequent regens is getting on the interstate for 50 miles at 80mph.
He also said the dealer won’t tell you that because they are making money off Chrysler for warranty work when people bring their trucks in.
So far by doing that I went from a regen every 3 to 4 days to 14 days. I went ahead a made a fuel run and did the 50 mile trip since it just did a active yesterday

 

[AH64ID]

Can’t remember if I told you or not … A mopar mechanic told me that the only solution to frequent regens is getting on the interstate for 50 miles at 80mph.
He also said the dealer won’t tell you that because they are making money off Chrysler for warranty work when people bring their trucks in.
So far by doing that I went from a regen every 3 to 4 days to 14 days. I went ahead a made a fuel run and did the 50 mile trip since it just did a active yesterday

You did mention that.

It’s not the only way, but it does put the truck into passive regen and that helps out a lot.

 

[Leadchuncker]

You did mention that.

It’s not the only way, but it does put the truck into passive regen and that helps out a lot.

So what are you watching on your cts3 ?
A friend gave me a run down sheet he got from someone and I’ve got all that on the 3rd page , 1st page it’s egt 1 and 2, turbo temp, dpf pressure, soot % and the regen time and mile.

 

[AH64ID]

My main display includes

Fan Speed
VGT Position
Torque Converter temp
EGT 1
EGT 3
EGR Position
Rail Pressure
Gear & TCL
DPF %age
Intake Air Temp

I like to have engine load up, but there is a software glitch with the CTS3 right now and it’s not working.

I then have a bunch of other stuff on the 2nd page. Can’t remember them all right now…

EGT 1-5
VGT position
Exhaust preasure
Boost
DPF backpressure
Regen miles
Regen time
Ambient Air Temp

 

[John Jensen]

As far as the miles and time for regen that the CTS3 displays I would ignore it. I’ve never seen it accurate and mine shows 0’s for both right now. It’s pretty useless.

Agree. I have never seen those PIDs work on either my 2016 Eco or my 2020 6.7

 

[Will_T]

100% means the truck needs to regen. That can be based on time, 24 hours max, or it can be based on soot loading. It’s a % of regen, not of soot loading. Even if a regen is due for soot loading the DPF won’t be at 100% on the dash since the truck regens for loading at around 45-47% DPF loaded.

The reason it goes from 45% to 15% is because it’s using soot loading to determine the %, meaning the soot loading is more than the time to regen. When driving and the soot loading is low the ECM has a harder time knowing the exact soot loading based on varying temps and flow thru the DPF so it estimates high (~45% is what I commonly see too), but when you restart it the next morning it gets a much more accurate delta pressure in the DPF and thus the more accurate reading at 15%. It will then climb based on driving style, time, loading, etc. The lower number will slowly start to climb based on engine hours. Every ~14 minutes is a 1% minimum increase.

You could think of two scales going on, one is soot loading and one is time to regen. The CTS3 is showing the higher of those two numbers. It can go back and forth between the two scales at anytime, which is why the percent sometimes bounces at lower numbers.

I find that under 50% on the CTS3 is jumping back and forth between time and soot loading. Above 50% is normally driven by time and more stable. That’s with a driving style that goes the full 24 hours between regens. If your driving style needs more frequent regens then the CTS % is going to be based on that.

As far as the miles and time for regen that the CTS3 displays I would ignore it. I’ve never seen it accurate and mine shows 0’s for both right now. It’s pretty useless.

This is much like what I see on my Banks iDash also, including the more accurate morning reading. It jumps around a lot below 45-50% then settles down and from 50 to 100% tracks the time until the 24 hour regen. My driving style seems to make for only the 24 hour regens. Although there was a time period where after taking it in for service a couple of times, the 24 hour regens were wonky. I came to think that the dealer flashed updated software of something that reset the 24 hour clock so that I had way more than 24 hours between regens.

 

[Leadchuncker]

What are y’all’s driving styles?
I try not to idle, I don’t drive like pawpaw but I don’t drive it like a wild teenager ether..

 

[Will_T]

What are y’all’s driving styles?
I try not to idle, I don’t drive like pawpaw but I don’t drive it like a wild teenager ether..

I pretty much only tow the TT with mine so that is likely why I only have ever seen 24 hour regens. Have had the truck about 2 years now and still well under 10,000 miles probably 90% towing.

 

[firemansdiesel]

What are y’all’s driving styles?

I just drive the truck no different than any other truck I owned. I don’t do a lot of city driving with more highway or county roads. I always hit the 24hr time frame with regens. Most my DPF% guage in my truck cluster showed was between 25%-50%. Unless your 100% driving in city stop and go. You should not have any issues unless something is defected In the emission sytem. Usually up stream from the DPF that causes the clogging isssues.

 

[AH64ID]

What are y’all’s driving styles?

Minimal idling. If I commute in the truck it’s rural driving with a few stop signs, one stop light, and 45-50 on most the roads. After 8-10 days of this style driving I’ve seen the truck go into regen once before the 24 hour cycle.

Normally I don’t DD it often. When I’m not using it as a DD it’s for truck style errands, hunting, towing, etc and always goes 24 hours between regens.

April-Nov are my heavier towing months and then it doesn’t usually get driven much Dec-Mar.

Right now I’ve got ~31% towing miles, but I also drove it a bunch this spring to/from work because I like driving it. I was above 50% towing on the truck at the end of hunting season.

 

[Leadchuncker]

I just drive the truck no different than any other truck I owned. I don’t do a lot of city driving with more highway or county roads. I always hit the 24hr time frame with regens. Most my DPF% guage in my truck cluster showed was between 25%-50%. Unless your 100% driving in city stop and go. You should not have any issues unless something is defected In the emission sytem. Usually up stream from the DPF that causes the clogging isssues.

Minimal idling. If I commute in the truck it’s rural driving with a few stop signs, one stop light, and 45-50 on most the roads. After 8-10 days of this style driving I’ve seen the truck go into regen once before the 24 hour cycle.

Normally I don’t DD it often. When I’m not using it as a DD it’s for truck style errands, hunting, towing, etc and always goes 24 hours between regens.

April-Nov are my heavier towing months and then it doesn’t usually get driven much Dec-Mar.

Right now I’ve got ~31% towing miles, but I also drove it a bunch this spring to/from work because I like driving it. I was above 50% towing on the truck at the end of hunting season.

I drive it 50 miles a day, it’s usually around 65mpg during that commute as well. During that with egt2 temp it should be doing a passive regen several times. As for a active regen it’s like every 1/4 of a tank of fuel and that’s a 50 gallon tank.
It’s been at the dealer and Chrysler tells them it’s within spec. They have swapped out a faulty dpf sensor and reflashed the computer but it just seems excessive to me.
I did drag the camper to the shop yesterday which wasn’t but 5 miles but it did build some egt’s that held steady . Egt2 stayed in the 700’s the whole way.
Maybe I’m just over reacting with the way it’s regening .

 

[Will_T]

As for a active regen it’s like every 1/4 of a tank of fuel and that’s a 50 gallon tank.
It’s been at the dealer and Chrysler tells them it’s within spec. They have swapped out a faulty dpf sensor and reflashed the computer but it just seems excessive to me.

Am I understanding correctly that you get a regen every 1/4 tank of fuel? So maybe every 2 hours or so? That seems crazy to me, and I can't believe that Ram would say that is normal? Maybe I am misunderstanding what you are saying but mine regens every 24 hours and never sooner. That is several tanks of fuel. I have a 52 gallon tank. I just took about a 2,000 mile trip and it regened twice during the trip, once shortly after we left and again on the last leg home. Both were on 24 hour marks. Probably about 1,800 miles of that was towing and 200 empty. A fair bit of idle time also. Even when I am at home and all the driving is in town, I still only get the 24 hour regens. I have not paid attention to miles or tanks of diesel, but I would say I go 2 or 3 fill ups between regens, at the least. As far as DEF use, on that same trip, I put in a box before we left and that put the DEF gauge at just over 3/4 full. I put in another box on the last leg home which brought it to 3/4 again. When we got home, it was still just below 3/4.

 

[Leadchuncker]

Am I understanding correctly that you get a regen every 1/4 tank of fuel? So maybe every 2 hours or so? That seems crazy to me, and I can't believe that Ram would say that is normal? Maybe I am misunderstanding what you are saying but mine regens every 24 hours and never sooner. That is several tanks of fuel. I have a 52 gallon tank. I just took about a 2,000 mile trip and it regened twice during the trip, once shortly after we left and again on the last leg home. Both were on 24 hour marks. Probably about 1,800 miles of that was towing and 200 empty. A fair bit of idle time also. Even when I am at home and all the driving is in town, I still only get the 24 hour regens. I have not paid attention to miles or tanks of diesel, but I would say I go 2 or 3 fill ups between regens, at the least. As far as DEF use, on that same trip, I put in a box before we left and that put the DEF gauge at just over 3/4 full. I put in another box on the last leg home which brought it to 3/4 again. When we got home, it was still just below 3/4.

Yes !
My daily commute is 50 miles, and 95% of that is 65mph . Oh I’ve had it regen 3 times in 7 days before. If I’m towing it’s better or if I’m running empty on the interstate it’s good but my daily kills it.
Chrysler says it’s within spec and doesn’t want to do anything about it.
Ram care wants me to take it to a second dealer because the first one kept it 5 days, never addressed the recalls, ram the **** outta it, burned a 1/2 tank of fuel outta it, says it’s got a problem then changes up and says according to Chrysler it’s good to go…

 

[joshuaeb09]

Yes !
My daily commute is 50 miles, and 95% of that is 65mph . Oh I’ve had it regen 3 times in 7 days before. If I’m towing it’s better or if I’m running empty on the interstate it’s good but my daily kills it.
Chrysler says it’s within spec and doesn’t want to do anything about it.
Ram care wants me to take it to a second dealer because the first one kept it 5 days, never addressed the recalls, ram the **** outta it, burned a 1/2 tank of fuel outta it, says it’s got a problem then changes up and says according to Chrysler it’s good to go…

Yea something seems wrong there. Most of my driving is highway trips between 30-45 Miles one-way and the occasional 100-300 mile trip for work every month or two. Towing sporadically throughout the year and the one thing I try to avoid as much as possible is any short trip or stop/go driving if I can. I've never hit active regen before the 24 hour mark, but I have seen the DPF start to load up if I have a bad week of like Dr's appointments during peak traffic hour. Usually when this happens a nice weekend drive doing 70+ for about 30 minutes will bring it back down. Coincidentally that's about how long it takes me to get out to the property so the drive to and from will usually clean me out, especially if it isn't particularly loaded.

 

[UGARude]

Just an update here. Had the regen issue a month ago. Bought the Hot Shot's Diesel Extreme and added it to a full tank. DEF fluid has remained above half a tank. Have not let the truck idle longer than a minute or two after starting up. My check engine light came on again yesterday with the same P2459 code for regen frequency. I'm somewhat at a loss on what else to do at this point. My truck is my daily driver and my commute distance is what it is. I hate that I paid what I did for the truck and can't drive it how I like without constantly worrying about when my check engine light is going to come on. I drove an F250 for 3 years and never once had this issue.

I posted this earlier today on another related thread and it falls within this topic. I left it out of the previous post but my commute is 30 miles round trip doing roughly 80% interstate speeds (65-75mph). Any ideas?

 

[Diller]

I posted this earlier today on another related thread and it falls within this topic. I left it out of the previous post but my commute is 30 miles round trip doing roughly 80% interstate speeds (65-75mph). Any ideas?

I had very similar situation. Took to the dealer a few times with no real solution. Did some internet research and found that the incorrect air filter causes some weird issues. I swapped back to OEM from Wix and the regen cycles went from 80-100 miles to 300+ miles.

Driving habit is 60-70 mile commute daily, 90% interstate. Towing a trailer on the weekends between 5,000-14,000 pounds.

 

[UGARude]

I had very similar situation. Took to the dealer a few times with no real solution. Did some internet research and found that the incorrect air filter causes some weird issues. I swapped back to OEM from Wix and the regen cycles went from 80-100 miles to 300+ miles.

Driving habit is 60-70 mile commute daily, 90% interstate. Towing a trailer on the weekends between 5,000-14,000 pounds.

I appreciate the reply. My truck only has 5xxx miles and still has the OEM air filter so unfortunately I don't think that's my culprit. Good info though and I'm glad it's helped for you!