Regeneration Frequency Issue: MAF Poll

[OLEJOE]

Mine is used for a DD but Im retired and sometimes it sits for a week without being driven. I also have an older Silverado gas burner I use for short trips. I used to run a two lane highway to town and back about 15-20 miles one way but the truck was regening every 10-14 hours with anywhere from 300 to 450 miles between them. Now I run the interstate where I can run 70-75 mph as much as possible and it has definitely helped. Also started using a new to me fuel produced by Mobil and it seems to help also. When Im towing it doesn’t seem to matter what I put in the tank.
I hope mine holds out also.

I can’t believe only 12 people have signed in on this poll. Surely there are more than 12 members on here with 21+ trucks. Maybe they think they’ll jinx themselves by voting? Polls like this are the only way we’re going to find out what is going on with our trucks.

 

[scdo]

I voted for the China part and have the issue… caveat is that I just got it back from the dealer and they’re now telling me they changed the MAF sensor. I’m not 100% sure which part I had prior to my visit… they tell me they have the “correct” part on back order so I was surprised to see mine stamped with China.

I’ll change my vote if the issue is gone but I doubt it!

 

[kfscoll]

Mine seems to have improved significantly after I changed fuel (from cheap Thornton's to BP) and started adding Hot Shots Secret Diesel Extreme/EDT. I'm at about 1000 miles since my last active regeneration now with mixed highway/in-town driving and no towing. If I see the DPF gauge jump up a notch or two I'll take a quick highway run (the faster the better) and that'll usually get it back down to zero.

 

[OLEJOE]

Mine seems to have improved significantly after I changed fuel (from cheap Thornton's to BP) and adding Hot Shots Secret Diesel Extreme/EDT. I'm at about 1000 miles since my last active regeneration now with mixed highway/in-town driving and no towing. If I see the DPF gauge jump up a notch or two I'll take a quick highway run (the faster the better) and that'll usually get it back down to zero.

That’s the way mine is. Changed to the Mobil Synergy Efficient Fuel and if the gauge goes up to a 1/16 I take it on the highway for 20 or 30 miles and it’s back to zero. It’s actually been passive regening in the 15 mile trip to town.

 

[scdo]

I voted for the China part and have the issue… caveat is that I just got it back from the dealer and they’re now telling me they changed the MAF sensor. I’m not 100% sure which part I had prior to my visit… they tell me they have the “correct” part on back order so I was surprised to see mine stamped with China.

I’ll change my vote if the issue is gone but I doubt it!

Confirmed, it’s still happening with the China part. What I’m not sure is if I always had this part or if they changed it. Either way, there’s another on order.

Are we sure the issue is China vs Germany? The doc that was recently posted shows two different part numbers but no mention or country of manufacture.

Any one know how to confirm the part number of the MAF Sensor installed? The numbers on it don’t match what is in the doc below.

 

[OLEJOE]

Mopar sources these parts from the manufacturer and assign their own part number. Only way to tell is what number they have assigned and printed on the bag they put it in.
My MAF has a Cummins number on it.

 

[ironmike]

Here's some recent data for you also. 2020 3500 HO Aisin Mega 4X 46k miles.. I have been having regens at a rate of everyday less than 24 hour of driving prior to 12/10/23. I read elsewhere that a possible dirty MAP sensor right next to the throttle valve could be causing frequent regens. So I removed MAP sensor and noticed heavy black soot completely covered. Also surprised no code popped prior. I researched and found MAF spray or alcohol was recommended to clean sensor. Cleaned sensor with alcohol, Q-tips and compressed air to dry completely. Confirmed there was zero black soot remaining. Installed clean sensor and have not had a regen cycle since 12/10. It is now 12/6/. Also pulled and checked both sensors on air filter top and confirmred they are perfectly clean. I will try and update for the next couple regen cycles to show duration between cycles. Hope this is the answer for these soot infested EGR engines...

 

[OLEJOE]

Here's some recent data for you also. I have been having regens at a rate of everyday less than 24 hour of driving prior to 12/10/23. I read elsewhere that a possible dirty MAP sensor right next to the throttle valve could be causing frequent regens. So I removed MAP sensor and noticed heavy black soot completely covered. Also surprised no code popped prior. I researched and found MAF spray or alcohol was recommended to clean sensor. Cleaned sensor with alcohol, Q-tips and compressed air to dry completely. Confirmed there was zero black soot remaining. Installed clean sensor and have not had a regen cycle since 12/10. It is now 12/6/. I will try and update for the next couple regen cycles to show duration between cycles. Hope this is the answer for these soot infested EGR engines...

I cleaned both sensors on mine while doing the other stuff but neither one was very dirty at 8300 miles. I hope you found an easy solution for this. Very easy to take those out and clean even if having to do it on a regular basis.

 

[AH64ID]

In addition to the potential MAF sensor issue I think there needs to be a programming update. Active regen simply isn’t long enough on the 24 hour timer if you’re not towing often, even if it’s not interrupted and driving is good for active regen.

I barely made it to a 24 hour regen this time, gauge was nearly 40% the last 3 hours, and the regen was 17 minutes long… but only 5-7 minutes with the DPF at ~1000°F. As soon as the regen finished the dash gauge still read 12.5%. I was able to get it to 0% with a quick high boost/high rpm acceleration.

Which brings me to my next programming issue, which easily could be the MAF, at low airflow the OBDII soot loading goes up much faster and a quick high boost/high rpm acceleration on a 600°+ DPF usually brings it substantially down. It will even go up when the DPF is hot enough to be doing passive regen.

I don’t have much passive regen driving coming up, so I doubt I make it 24 hours… especially considering this last active regen didn’t get the DPF as clean as usual.

 

[scdo]

Here's some recent data for you also. 2020 3500 HO Aisin Mega 4X 46k miles.. I have been having regens at a rate of everyday less than 24 hour of driving prior to 12/10/23. I read elsewhere that a possible dirty MAP sensor right next to the throttle valve could be causing frequent regens. So I removed MAP sensor and noticed heavy black soot completely covered. Also surprised no code popped prior. I researched and found MAF spray or alcohol was recommended to clean sensor. Cleaned sensor with alcohol, Q-tips and compressed air to dry completely. Confirmed there was zero black soot remaining. Installed clean sensor and have not had a regen cycle since 12/10. It is now 12/6/. Also pulled and checked both sensors on air filter top and confirmred they are perfectly clean. I will try and update for the next couple regen cycles to show duration between cycles. Hope this is the answer for these soot infested EGR engines...

I took the MAS sensor out and cleaned… it was a little dirty. 75 mph test drive and it went for 20% to 30% in maybe 5-10 miles. Bummer.

 

[joshuaeb09]

In addition to the potential MAF sensor issue I think there needs to be a programming update. Active regen simply isn’t long enough on the 24 hour timer if you’re not towing often, even if it’s not interrupted and driving is good for active regen.

I barely made it to a 24 hour regen this time, gauge was nearly 40% the last 3 hours, and the regen was 17 minutes long… but only 5-7 minutes with the DPF at ~1000°F. As soon as the regen finished the dash gauge still read 12.5%. I was able to get it to 0% with a quick high boost/high rpm acceleration.

Which brings me to my next programming issue, which easily could be the MAF, at low airflow the OBDII soot loading goes up much faster and a quick high boost/high rpm acceleration on a 600°+ DPF usually brings it substantially down. It will even go up when the DPF is hot enough to be doing passive regen.

I don’t have much passive regen driving coming up, so I doubt I make it 24 hours… especially considering this last active regen didn’t get the DPF as clean as usual.

That's interesting as my 24hour regens can run quite long on some occasions by comparison. The last 24 hour regen that I hit took somewhere around 35 minutes (didn't exactly time it) coming back from a work trip under the following conditions -

• Highway running ~80MPH empty unless you count my luggage as a load lol. I had done some city driving in Austin, but most of the trip my truck was parked at the office since I can expense uber so this was about 90% highway round trip.
• Tank had a perf dose of HSS EDT since I knew this tank was going to run a regen.
• Truck was already up to temp and had been running for about 30 minutes down the highway (I try to time my 24 hour regens for a good highway run if I can)
• Slowest rate of travel throughout the regen was ~65MPH, highest was ~85MPH
• EGTs stayed up and the DPF spent a good chunk of time north of 1000 degrees once active regen started - I'd say at-least 15 minutes, above 850 degress for a good long while after the active regen was completed
• Post regen I had about another hour of highway driving to get home

Another thing that I try to do when I'm in active regen if on the highway, that I did that night, is to get a high boost run in immediately after the active regen stops. I just hit an off ramp, drop it down to grandma 15 under the access road speed limit slowness, and then hammer down on the on-ramp. IDK if it's in my head or just like what you're noticing, but I find doing that while the DPF is hot seems to clean the damn thing out better.

 

[AH64ID]

That's interesting as my 24hour regens can run quite long on some occasions by comparison. The last 24 hour regen that I hit took somewhere around 35 minutes (didn't exactly time it) coming back from a work trip under the following conditions -

• Highway running ~80MPH empty unless you count my luggage as a load lol. I had done some city driving in Austin, but most of the trip my truck was parked at the office since I can expense uber so this was about 90% highway round trip.
• Tank had a perf dose of HSS EDT since I knew this tank was going to run a regen.
• Truck was already up to temp and had been running for about 30 minutes down the highway (I try to time my 24 hour regens for a good highway run if I can)
• Slowest rate of travel throughout the regen was ~65MPH, highest was ~85MPH
• EGTs stayed up and the DPF spent a good chunk of time north of 1000 degrees once active regen started - I'd say at-least 15 minutes, above 850 degress for a good long while after the active regen was completed
• Post regen I had about another hour of highway driving to get home

Another thing that I try to do when I'm in active regen if on the highway, that I did that night, is to get a high boost run in immediately after the active regen stops. I just hit an off ramp, drop it down to grandma 15 under the access road speed limit slowness, and then hammer down on the on-ramp. IDK if it's in my head or just like what you're noticing, but I find doing that while the DPF is hot seems to clean the damn thing out better.

My soot load initiated active regens are longer, but my 24 hour ones are usually under 20 minutes. It’s been a bit since I had one in the conditions you just did, but those are around 10-15 miles which isn’t long at interstate speeds.

 

[CaptainMike]

This has been mentioned before, but with these frequent regens be mindful of fuel diluting your crankcase. I checked mine yesterday and it was about a quart over on the dipstick. I immediately had it changed and will pay closer attention going forward. Gawd, these are awful, awful vehicles. Stellantis should be ashamed of these, but greed and apathy knows no shame.

 

[batman900]

2024 built 9/23 and have the China sensor without issue. Hasn't moved from zero in the 800 miles I've put on it so far. 18 running hours, no towing but lots of highway. My dad has a 23 with the regen issue at 4k miles, not sure which sensor he has yet but I asked him to check.

 

[DougB]

2024 built 9/23 and have the China sensor without issue. Hasn't moved from zero in the 800 miles I've put on it so far. 18 running hours, no towing but lots of highway. My dad has a 23 with the regen issue at 4k miles, not sure which sensor he has yet but I asked him to check.

Does it have ABMBV on it like the one in this post?

Regeneration Frequency Issue: MAF Poll

Trying to collect some data on the regeneration frequency issues. Based on all my research it sounds like the MAF (Mass Airflow Sensor) may be at the heart of many of these problems. There are, as far as I know, two different MAF sensors currently in circulation for these trucks. These can be...

hdrams.com

 

[batman900]

Does it have ABMBV on it like the one in this post?

Regeneration Frequency Issue: MAF Poll

Trying to collect some data on the regeneration frequency issues. Based on all my research it sounds like the MAF (Mass Airflow Sensor) may be at the heart of many of these problems. There are, as far as I know, two different MAF sensors currently in circulation for these trucks. These can be...

hdrams.com

Yep it does.

 

[mruysch]

2019 3500HO 150000km. No problems yet. German maf

 

[mbarber84]

Adding info as of 12/22/23. The MAF sensor stamped with ABMBV is part number 68444077AA and is the one produced in China.

 

[Blackpowder]

Adding info as of 12/22/23. The MAF sensor stamped with ABMBV is part number 68444077AA and is the one produced in China.

Does this mean the 68334657A part number called out in the Stellantis regen document is the AARFN (German) sensor?

 

[mbarber84]

Does this mean the 68334657A part number called out in the Stellantis regen document is the AARFN (German) sensor?

I would assume so.