So far my last 4 regens started with only a few miles left to my destination. I normally don't catch them in progress, and only know it was going when I park and can hear the tick ticking of the exhaust system and smell it. It usually gets it down to 20%, and it happened again this morning with less than 5 miles to work. Its at 30% now. I knew I should have brought my new scan tool with so I could do a manual regen on the way home.

Anyone know if these will cause an issue later on?

 

In forscan you can add the auto regen checkbox. When I get close to 100 I'll uncheck it if I want to delay the regen till the next day on a longer drive. As soon as you recheck it when you're driving it'll begin...

Time will tell but it definitely cant be good for your rig. Hot egt's thru the turbo and extra fuel being added could also make the fuel dilution numbers higher in your oil.

 

I didn't see the auto regen available for my 2019, I will double check the spread sheet. Since I have the bi directional scan tool though, I can trigger it manually and not worry about it. What is odd is when I left home it was at 70%, no way it would go to 100% in less than 50 miles, so must be triggered by miles instead of percent.

 

After you add the dpf screen (adding 8 to whatever the second value is on the 720-07-02 as built), go into the plain English side of the ipc/pcm and select option 3 for the regen screen. (dpf manual regen)

It's not on the as built side, itll be on the plain English side.


I've found that the percentage is based either off of mileage or dpf soot loading, whichever is higher. Itll happen at 500 miles regardless of soot load (and it will be a short regen) or it will happen when the soot load has reached the threshold. Some people have said here that 100% on the screen isn't truly 100%, and the truck isn't truly full until 300%...


regens will also automatically stop as soon as you stop and put it in park. So if you had to shutdown mid regen, it would be fine to shutdown if you idled for a bit and let things cool off.

 

As stated it's best to make the Forscan changes and turn off auto regen until it's at 100%. Then you can either initiate an OCR from the dash or if you're on the highway turn auto regen back on.

 

Adding OCR to my truck was the best Forscan change I could have made. A lot of folks say to just let the truck do its thing, but these partial regens are the reason that just doesn’t work for me. I keep the active regen turned off until I got about 95% and then I go for a ride and let the regen fully complete, AND let my EGTs get back to normal before shutting it down. Does it help in the long run, I can’t say but it sure seems a lot better for the truck to let it fully complete a regen rather than driving around all the time with only a partial regen complete. Likely more fuel efficient too since it runs the full regen completely at once, rather than trying to complete a regen every time it’s turned on. Also, by doing it this way it’s no problem to actually bypass the 500 mile regen trigger so it’s actually going into a regen when it needs too.

If you can’t add it via Forscan to your 19, at least with a monitor you will know when it’s happening and can let it complete. The iDash will let the 17-19’s perform a manual regen from it as well, but it may only be a static regen. Can’t say if it’s also an active regen while driving.

 

I still need to get around to enabling OCR on my 19. I've had the DPF% screen on for 3+ years and often times can complete a regen. I don't believe taking it down to 20-30% is going to cause any issues though. Oddly enough my last regen was completed to 0% almost entirely while in park, just idling. Not even a high idle, 90% down to 0%. So if you aren't able to continue driving, but can idle it, try letting it idle for awhile. You might even try using a high idle if you have the truck setup to do that.

 

Yep, took the wife to town this morning so she could get a few things. Started my Regen on the way. It wasn't done when we got there, so I just kicked on the high idle and told her I would wait in the truck to finish the regen. Win, Win for me.

 

I'm going to use this excuse next time!

 

So I enabled the checkbox and have been watching it. The last time a Regen ended I took a picture of the Odometer. So far 821 miles since the last regen, iDash reports 36% SL, and the dash shows 60% DPF percent. So that confirms what I thought was going on, it was regen based on miles regardless of soot level. Going to trigger a regen when dash reads 100% OR when idash reads 50%, whichever comes first, and record the miles between.

 

get an idash

set it to monitor DPF SL , DPF RG and REGEN

DPF RG seems to be the most accurate indication that regen is approaching. REGEN will tell you the REGEN is in progress.

the only consequence of excessive interupted regens is fuel dilition in the oil and coking of soot in the DPF as new layers of soot accumalate and compress older layers. the older layers become harder and more difficlut to burn off.

one other gottcha is that after a interupted regen...the next short term trip inpacts continuance of the regen due to the need for regen engine temp being reched...regen wont resume until you hit operating temp. that may never happen during stop and go winter driving.

 

you're doing the right thing wanting to control your Regen cycles so they can complete in one go vs being interrupted. Equipment owners with operators that dont understand or just dont care about DPF regen can tell some great stories of replacing DPF early because of caked up soot from interrupted regen cycles. Ive pulled apart a few DPF from my fleet customers equipment and you can see the layers of soot and how it glazes over after the regen was interrupted and then new soot builds on top making the regen process even longer next time and so on.

 

On my 2015, I would get the notice pop up on the dash, saying "Cleaning Exhaust Filter" but I don't get that on my 2022. But the tell-tale way to know, is when your indicated milage is extremely low for no reason.....like going down a hill in Overdrive, but only indicating 12 mph....instead of 25+.....

 

No it won't, just drive the truck

 

I'm pretty sure regen stops when you put it in neutral or park. If I need to stop driving during a regen, I'll sit and idle or high idle for a minute or two to get the fuel out of the cylinders, and it will usually continue to drop 5% or so according to the DPF screen, but that's it. It's never continued the regen process once I'm out of drive.