Hi there!

My truck has a strange behavior with regens that mostly I am just curious what it is doing, and if it is normal. I recently got an edge insight so I can see more of what it is doing while towing/traveling etc. Also during the winter I do a lot of daily driving and not long trips so want to keep an eye on the DPF/emissions etc.

At times when I am parked in a parking lot, or my truck is sitting in the driveway in park just idling it will go into regen mode (DPF Status: On). It will do this after only a few minutes of sitting even when its not all the way warmed up. When it does this repeatedly I will just park in the driveway and leave it and it will ramp up to 1K RPM and go for anywhere from 15-25 minutes or so and then go back to normal. It will seem to try and do it repeatedly, but if I let it sit and do as described it will stop trying for a while. It has done this only once since I have had the edge and kept an eye on it, when it started the dpf load was about 35% and 3grams. I watched and the EGT3/4 got up to about 1000 degrees for a bit, but in the end it doesn't really seem to do much, when it stopped the dpf load and soot was still the same at 35% and 3g. So even though the DPF status is on and its ramped up it doesn't seem like it is actually cleaning anything out. I haven't commanded a manual regen yet, I kinda wanted to see what it does when I get on the highway sometime with the edge before I do, but also the DPF load (now a few days later at about 45% still doesn't seem like its high enough to trigger anything.

I have seen my truck at the dealer before when they have commanded a manual regen with it parked and it ramps up to 2k rpm with the fans a blazing sounding like its going to take off like a harrier jet, what I describe above is NOT that.

Also oddly enough the distance since last regen has been the same, 490something and have driven 50 or so miles and doesn't increment at all so I don't know what that actually means or if something is wrong with that PID. Or doesnt mean what I think it means.

I took a short video of sitting in the parking lot of my kids school where the dpf status switches to on while in park sitting there not fully warmed up, and it goes back to off when i touch the brake.

You Tube

The ford dealer hasnt been much help, asked if I could bounce a couple questions off the diesel tech and the service manager suggested I check out the forums. As silly as I think it is the service department would send me to online forums instead of just answering my questions, here I am to see what you all think, or see if anyone else has witnessed this behavior.

Thanks!

 

Just as a reference my 19 would sometimes do that say waiting in a drive thru line etc. This would happen even if it wasnt close to a regen by mileage or % full DPF. Thought it was strange but just left it alone with no problems. My 23 has not done this yet. LOL

 

I mean I thought it was doing some kind of regen but I read that being in park disables regen, mostly why I got the insight, I see DPF status flips to on, it acts like its doing something but never gets high/hot enough to actually do anything. Seems like it just wastes fuel for 20 minutes. But my prying mind wants to know wtf it is doing.

 

Why are you idling it for so long?
If you are worried about emissions performance, that is counter to it.

 

I'm a little surprised that the monitor shows an active regen since it's not really a full blown regen or intended to burn off soot in the DPF. The SSM below is what I think you are experiencing.

 

Hot snot, that sounds exactly like what it does. Where did you find that?

Thanks

 

The question comes up from time to time so I usually keep the screen shot handy. The SSM# has changed a couple times to include newer years, that was sourced from the NHTSA site.

 

Interesting still if it is this that if triggers the DPF Status “On” PID

 

Elevated high idle is normal, my 2018 does it all the time since dealer reflated it in 2022. After 45sec or so it goes to 1k rpms. It keeps the dpf from clogging up for long idle time

 

Email the tuner company and ask what input they get from the truck to determine regen status.

 

My 2017 will go into elevated idle (1000 rpms) after about a minute or so. That started after the emissions reflash recall done by the dealer. It did not do that before the reflash. I will check my ScanGuage ll next time to see if indicates a regen.

 

Feedback from a lot of the pre 2020 owners seems to indicate the reflash initiated this programming. I used to post in these threads that I had never experienced the elevated idle in my 2019, even after the reflash. Just recently however, while out of town in Tahoe, I did experience it. It kicked up after several minutes of idle time one morning.

 

My ‘23 does this now too. But I do love the efficiency of the ‘23-24 regen process. Mine kicks on at 500 miles or 55+% and burns to 0% in about 5 mins, no exaggeration. It is a much better system. Unnecessary, but better.