2020 F-250 Lariat crew 4x4, 6.7, 10R140, 61,000 miles. since about the first week of november it has been doing a regen roughly every 300 miles. all summer it was more like every 500 to 600.
my drive to work is 11 miles, mostly town. we have had a few mornings in the 20s here in Waco, which for us is cold, and i have been letting it idle in the driveway for ten minutes on those days because my wife likes a warm cab.
my brother in law, the hot shot one, says delete it and be done with it. i am not doing that. i want to know what is actually wrong, if anything.
diesel_shop_marcoHigh hoursFresno, CA71 posts, joined Nov 2025
good, because nobody here is going to help you delete it, and i would not do it in my shop either. it is illegal under federal law, the EPA has gone after shops and tuners hard, you lose the emissions warranty, and the truck becomes hard to sell. in California it cannot be registered at all.
your symptoms first. eleven miles of town plus ten minutes of idle is about the worst duty cycle a modern diesel can have. the exhaust never gets hot, soot builds, and the truck regens more often to burn it off. some of what you are seeing is probably just november.
but a jump from 550 to 300 is enough that i would check a few things. the sensor that reads pressure across the DPF, and the two small rubber lines running to it. on these trucks the hoses crack, the sensor reads a higher soot load than is actually there, and it regens early. that is a cheap part. also an injector or EGR issue making more soot than normal, which a scan will show.
gooseneck_haulerPullingArdmore, OK38 posts, joined Nov 2025
on the Ram side, i had the same thing two winters ago on a different truck and it was the idling, plain and simple. stopped idling it and took the long way to the feed store twice a week, 25 minutes on the highway, and the interval came back. try the highway thing for a week before you spend money.
mod_tracy_lModeratorCheyenne, WY88 posts, joined Nov 2025
truck2017 F-350 XLT 6.7 Power Stroke, SRW long bed
mod note, since the brother in law came up: delete talk stays out of here, the rules thread covers it. this thread is a good one and it stays open.
practical things. put your VIN into the recall lookup at nhtsa.gov and see what is open, then have your Ford dealer check for service programs and software updates on top of that, because those do not all show up in the recall search. and if you like knowing things, FORScan with a decent OBD adapter will show you soot load and distance since the last regen on a 6.7. watching that for a week will tell you whether it is the sensor or the driving.
powerstroke_loyalOPPullingWaco, TX33 posts, joined Nov 2025
update. did the highway week and it helped a little, maybe 360 miles. then put FORScan on it and the calculated soot load was jumping up in a way that did not match the driving.
dealer found the rear hose on the DPF pressure sensor split right at the fitting. new hose and they replaced the sensor too, since it was cheap and they found a code history on it. 238 dollars out the door. two regens since, both right around 560 miles. so marco was right, and the brother in law was going to have me spend a couple thousand dollars to make it illegal over a cracked hose.
wife gets her warm cab from the remote start now, five minutes, not ten.
cold_start_in_fargoPullingFargo, ND29 posts, joined Nov 2025
saving this thread. my L5P regens more in the winter too, around 350 to 400 instead of 500 or so, and i was about to blame the cold. i am going to check the pressure sensor hoses before i assume anything, the GM ones are in about the same kind of spot.
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