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Old 01-28-2020, 09:11 PM   #21
Frankschro
 
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Default Re: DPF always goes up to 100 percent before starting regen

My 2019 brought up the message "Perform DPF Regen" as if I could choose this function manually. Checking the dash, it started at about 84% and came on every time I started the van. I drove the van for about an hour and the DFF reading went to about 98%. I suppose this will start at 100%. Does all this sound normal? Did everyone else get the request to perform a DPF regen?
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Old 01-29-2020, 03:54 PM   #22
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Default Re: DPF always goes up to 100 percent before starting regen

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Originally Posted by elemental View Post
From reading threads in the VS30 area, my understanding is that the 2019+ vans have a DPF percentage and ReGen indicator as available information in the dashboard display (I don't know whether a highline display is required in order to to see this information). In my case I'm using a ScanGauge II on my 2017 model year NCV3; the SG II provides DPF percentage and ReGen On/Off as X-gauges (programmable monitors) using the OBD-II interface to the van.
Not mine. Mine just has the info on how full it is before it starts regen. Then when it hits 100 percent regen starts. And if you stop the car during regen it just continues when you starts going again. I did that one on accident. Didn't knew it s going through regen. Stopped for the night and in the morning when I left I checked and saw that it was at 67 and going down. So they're made now to basically be worry free unless you start having real problems, which if that happens to me I'm just taking out off and risk a ticket. I'm not going to worry about it.
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Old 01-29-2020, 05:20 PM   #23
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Default Re: DPF always goes up to 100 percent before starting regen

Quote:
Originally Posted by Frankschro View Post
My 2019 brought up the message "Perform DPF Regen" as if I could choose this function manually. Checking the dash, it started at about 84% and came on every time I started the van. I drove the van for about an hour and the DFF reading went to about 98%. I suppose this will start at 100%. Does all this sound normal? Did everyone else get the request to perform a DPF regen?
Manual DPF regenerations are not a "Default" cure all for DPF/sensor issues and therefore not to be performed "Willy-Nilly."

The key is preventive maintenanc/measures, for example, avoiding interrupting automatic DPF regenerations is an essential preventive maintenance measure to hopefully ensure long DPF service life.
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Old 01-30-2020, 09:41 PM   #24
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Default Re: DPF always goes up to 100 percent before starting regen

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Originally Posted by Goran View Post
[...]And if you stop the car during regen it just continues when you starts going again. I did that one on accident. Didn't knew it s going through regen. Stopped for the night and in the morning when I left I checked and saw that it was at 67 and going down. So they're made now to basically be worry free unless you start having real problems, which if that happens to me I'm just taking out off and risk a ticket. I'm not going to worry about it.
I believe that the pre-2019 models with the DPF handle interrupted regenerations in the same way - the regeneration will automatically restart next time the vehicle is operated. The main difference appears to be the provision of an indicator of DPF status on the MY 2019+ vehicles that isn't there on pre-2019 vehicles (which is where the ScanGauge II comes in). I haven't read about major changes to the regeneration process programming itself.

The recommendations on trying to avoid interrupting regenerations are based on some data showing that frequent regeneration interruptions aren't good. My understanding is that part of the problem is that the regeneration process itself is dumping extra fuel into the system, which can accumulate in the engine oil under ? conditions. Hence the recommendations (as Bobnoxious pointed out) on operating the vehicle at speed on a highway every once in a while if the vehicle is seeing lots of short trips.
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Old 01-30-2020, 11:21 PM   #25
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Default Re: DPF always goes up to 100 percent before starting regen

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Originally Posted by elemental View Post
I believe that the pre-2019 models with the DPF handle interrupted regenerations in the same way - the regeneration will automatically restart next time the vehicle is operated. The main difference appears to be the provision of an indicator of DPF status on the MY 2019+ vehicles that isn't there on pre-2019 vehicles (which is where the ScanGauge II comes in). I haven't read about major changes to the regeneration process programming itself.

The recommendations on trying to avoid interrupting regenerations are based on some data showing that frequent regeneration interruptions aren't good. My understanding is that part of the problem is that the regeneration process itself is dumping extra fuel into the system, which can accumulate in the engine oil under ? conditions. Hence the recommendations (as Bobnoxious pointed out) on operating the vehicle at speed on a highway every once in a while if the vehicle is seeing lots of short trips.

My experience with 2015, OM 651, continued DPF interruptions illuminated the CEL and flaged code P2459, "DPF interrupted three times." I Checked code on Mecerdes site and said continued DPF interruptions could result in a hard Limp Home Mode, I understand resettable only by dealership or similarly equipped independent and only after DPF regeneration issue resolved which, may be nothing other than simply the driving the vehicle continuously for 2 to 3 hours to extinguish the CEL. Mine did and has not returned in 2-plus years, 5,000 miles.
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