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The sensor your truck is missing has no control over regeneration, nor does it provide data to the DPF for reading soot level. The data that shows how much soot is in the DPF comes from the differential pressure sensor, which your truck absolutely must have installed. If you only “glance at the gauge a few times”, you have a very good chance that all you will see is 0%. This is partly because you’re towing with the truck roughly 50% of the time, and you also may be looking at the gauge just after an active regeneration has completed. In either scenario, you would only see 0%. (Which is good).
I was under the impression that the missing sensor reported the DPF condition to the PCM and by extension the dash gauge. I stand corrected. Perhaps I'll pay a little more attention to the DPF gauge to see if it ever changes. My cluster is set to display engine vitals and I very rarely change from that screen.
I’ve experienced the same issues. Lol
That’s how mine was doing when I used to run the two lane highway to town and back. Since it’s only 15-20 miles to town, I think that was why mine was regening that often and the learning curve on my part as to how it operates. Running the interstate whenever possible has stretched my mileage and hours out until now Im getting 24 hour regens. Getting 850 +/- for miles. I cleaned the MAF, MAP sensors, changed brand of fuel and adjusted my driving style and it seems to be working. I also changed the original air filter out because it looked oily and I don’t know where that could have come from. If it builds up early, I’ll hook up to the TT and make a 50 mile trip and it’s good to go. I think if I was running 30-40 miles one way on the trips to town, it would never need any help making it to 24 hours.
Finally got around to calling Calibrated today.
Were you unloaded?
This was 7 miles later and then another 7 miles it’s already in regen again
I was unloaded and it was dry. It doesn’t make much difference loaded or empty. Mine will not stop a regen until it is at 0%. It takes 30-40mi sometimes more to finish. Basically it takes longer to complete a regen than it does to go into regen.
Is this a 2022?
This is exactly what mine has been doing for months, regardless of how I drive or what fuel I use. The dealership techs replaced the DPF per STAR and I picked the truck up last Tuesday. I drove the snowy 130 mountain miles home at various speeds as the conditions required and the regen screen stayed at zero. Then yesterday I drove about 450 mostly highway miles, hitting about 30 minutes of rush hour traffic and it stayed at zero for the whole trip. I don't know if this is a fix, but it's a step in the right direction. I hope.
Did they mention what they found when they removed the faulty DPF, or show you it? Curious if yours was one of the ones that demonstrated internal failure?
You are the man.
They did show it to me. My first thought when I looked down the tube was there was nothing wrong with it, and the mechanic agreed. He did point out a small area on the screen that looked like it got very hot, but there was no visible soot or anything that looked like an obstruction on any of it. There was no discussion of internal failures, and I don't know enough to ask those questions. A riddle wrapped in an enigma wrapped in a conundrum...
