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Stationary Regen?

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Old Dec 11, 2024 | 04:57 PM
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Stationary Regen?

So, I had something new happen today on my '22. I checked my DPF level yesterday and it was 75%. Pulled my work trailer 25 miles to job site this morning. Started the truck to warm up before pulling it home (10 degrees here). The homeowner wanted me to do something for him which took about 25 minutes. Left to go home and pulled up the DPF level and it was at zero. My on command regen was set to off. Never had that happen (or noticed it before).
 
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Old Dec 11, 2024 | 05:01 PM
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Frozen sensor?
 
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Old Dec 11, 2024 | 06:54 PM
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Nope, sitting in the 60 degree shop for 2 hours and still showing 0. I had it do the same thing when I I first got it. Evidently when it kicks into high idle it will regen when it's close.
 
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Old Dec 11, 2024 | 07:47 PM
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Possible that it did a passive regen since you were towing? My DPF will go from full to zero when i'm towing even if I have my auto regen turned off.
 
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Old Dec 11, 2024 | 07:50 PM
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It's possible, but I'm not sure the temps were high enough for a passive, guess I wasn't paying attention to the EGT's.
 
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Old Dec 12, 2024 | 06:14 AM
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These trucks will not active regen while parked without some sort of command from the driver. 25 miles with a trailer MIGHT have been enough but then the Active Regen would have needed to kick in when you started driving. It's at least 20 minutes of driving to complete an Active Regen when the PCM commands the action.
 
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Old Dec 12, 2024 | 06:28 AM
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That's what confused me. I had never had that much passive regen pulling that trailer. I will have to monitor it in the future. Maybe the planets aligned.
 
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Old Dec 12, 2024 | 01:25 PM
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In order to regen while idle you would have had to set the parking break and started the regen. Not sure at 75% it would have given the option yet either.
 
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Old Dec 12, 2024 | 05:34 PM
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I did a parked re-gen twice and neither time did I have to set the parking brake...2020+ feature?

Towing a trailer does not decrease my DPF %. It might maintain it, but I've never noticed it go down.

It had to have gone into a regen cycle on its own idling there. It wouldn't have been running otherwise from the auto shutdown timer timing out before the 25 minutes were up.
 
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Old Dec 12, 2024 | 07:21 PM
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Mine did a parked regen once for sure, no parking brake. But I don't remember if I had the OCR activated yet. I am going to try it again in the near future to see.
 
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