DPF screen never increases in percentage full - Dodge Cummins Diesel Forum
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post #1 of 16 (permalink) Old 11-18-2019, 11:26 AM Thread Starter
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DPF screen never increases in percentage full

When I got my 2019 Tradesman, I was thrilled to find a DPF % Full screen in the cluster menus under vehicle. I really appreciated seeing this feature on my Fords. It lets you know approximately when a regeneration will occur, and you can also see how effective the regen was.

However, my screen has never increased since I bought the truck a week ago. I have put 500+ miles on it.

Anyone know why this might be?

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post #2 of 16 (permalink) Old 11-18-2019, 11:34 AM
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there's a ton of talk around that screen. i've had 3 regens in ~6k miles, and that screen has never
shown me anything other than zero % full, even when it was in soft regen.

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post #3 of 16 (permalink) Old 11-18-2019, 11:35 AM
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It will. Give it time. It is sneaky also. Creeps up to about 15% then goes into regen and back to zero before you realize. Between now and the 1000 mile mark you will notice a really hot burning smell under the truck when you park. That's because it was in regen and burning off all the oils from being assembled.

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post #4 of 16 (permalink) Old 11-18-2019, 11:47 AM Thread Starter
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Quote:
Originally Posted by dgiturbo View Post
It will. Give it time. It is sneaky also. Creeps up to about 15% then goes into regen and back to zero before you realize. Between now and the 1000 mile mark you will notice a really hot burning smell under the truck when you park. That's because it was in regen and burning off all the oils from being assembled.
I was nearly certain that on day 1 it was at 25% but I paid little attention. Since then I have checked multiple times and it is always at zero. I'm very familiar with regens, having had them on my Ford 6.7L and my 2018 Cummins...heck, my Kubota tractor does them too (and it has a filter % full screen that actually works, lol).

Why would it regen at 15%?

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post #5 of 16 (permalink) Old 11-18-2019, 11:55 AM
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No idea. Best I can guess is the computer hates anything higher than 15% and goes on a seek and destroy mission. I spent a few days with that screen up and monitored the regens vs soot accumulation. No idea or real reason why it's so aggressive. There was a lawsuit and a DPF recall for the 13-18 so maybe the accountants forced the engineers?

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post #6 of 16 (permalink) Old 11-18-2019, 01:03 PM
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Here is some photographic evidence of the gauge changing over 5 miles if curious.
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post #7 of 16 (permalink) Old 11-19-2019, 05:42 AM
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Quote:
Originally Posted by dgiturbo View Post
Between now and the 1000 mile mark you will notice a really hot burning smell under the truck when you park. That's because it was in regen and burning off all the oils from being assembled.
Yep, and in my case, the stinky regen stuff persisted up to about 6K kms.

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post #8 of 16 (permalink) Old 11-19-2019, 10:12 PM
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Quote:
Originally Posted by daemon View Post
Here is some photographic evidence of the gauge changing over 5 miles if curious.
Oddly enough, I checked mine this morning. It's the first time I've ever seen the gauge at something other than zero. Here are two photos - about 30 miles between pictures.
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post #9 of 16 (permalink) Old 11-22-2019, 11:07 AM
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I kept this screen on all week to see what happened. Nothing other than the DPF gauge dropped slightly.
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post #10 of 16 (permalink) Old 11-22-2019, 11:38 AM Thread Starter
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Mine has never increased off from zero.

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2018 RAM 3500 Crew 4x4 6.7L DRW Manual Trans - previous
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post #11 of 16 (permalink) Old 11-22-2019, 10:34 PM
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Never seen mine over zero also don’t watch it all the time.
But mine Has regen about 2 times maybe 3 now with 3600mi.
Can kinda tell it’s regening woth engine noise changing a bit. But that’s it.
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post #12 of 16 (permalink) Old 12-02-2019, 05:08 PM
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The Regens drive me nuts. Within the first 5,000 miles, mine was doing regens every 2-300 miles. I was watching the DPF meter--it would creep up to about 1/3 full, and then kick into regen mode which would show on that same DPF meter screen. And each one lasted 40 minutes.

I complained to the dealer and tried to get my mechanic who I have a decent relationship with to tell me how it worked. (worried that if I didn't let it finish, it would just start over.) He said he had no idea what algorithms control the process. He did end up flashing it--telling me the update had something related to the DEF use? But now, the DPF meter is a bit erratic... almost always at zero, and I've only seen one regen in 2,000 miles, which only lasted a few minutes. Makes me think the meter has been "decommissioned," as in, "we don't want you to know how or when this is working anymore because too many people were beotching about it."

Does anyone know how it decides to regen? And can it be interrupted (engine turned off) without it starting completely over? I've been searching the threads to find anything concrete to no avail...

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