I have a 2022 2500 6.7 with 78k on it. About 6 months ago I got a regen frequency code. I had the wrong air filter with the glue strips on it. I changed to the correct MOPAR air filter and cleared the code. It hasn’t come back, but I am getting regens every 50 to 190 miles now. Recently changed the CCV filter and had the EGR cleaned by the dealer. My drive to work is 65 miles on the interstate one way at speeds of 65 to 80 mph. I run a fuel treatment as well. No rough idling, mpg is between 19.5 to 20.5. Any ideas what might be going on?
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Regen frequency
- Thread starter Mja2305
- Start date
Date of manufacture of mine is August of 21 so it doesn’t fall in on that TSB
It's not discussed much but after all the research I've done it seems there is a "relearn" process that could take over 1000 miles. There is a manual way to speed it up but it involves driving on the highway at like 2600 rpm for 30 min at a time, I think like 3 cycles of that. Needs to be a flat highway. There is a TSB somewhere about it.
I thought that was for the MAF sensor?
That's correct. It is one of the leading contributors to excessive regens. That's what the relearn process is for. But it may need to go through the process even after something as simple as an air filter change.
side note: 850 miles since my last regen. HALLELUJAH!!
Update to my original post. Talked to the dealer service dept about the regens after the EGR cleanout service, they said keep driving it and see if it improves. Couple days later I get an engine light for Regen freq. I bring it right to the dealer for them to diagnose. Couple days later I get a call that the MAF is dirty and they are going to replace, but have to order the part. Few days later the part gets installed dealer does the relearn on the MAF and then takes it for a test drive with no issues. Tech parks truck in lot comes back to move it after 20 min and motor begins squealing and knocking. Metal all in the filter and oil. Dealer doesn’t know what failed or why, but they think the motor is shot and needs to be replaced. I have about 22k miles left on the power train warranty.