DD13 SPN 3251fmi 21

[Therealarw]

(11-13-2025 )Rawze Wrote:  Pull the cans off it and have them professionally cleaned. doing hours worth of 'regens' on the truck does not clean them but about 2-3% at best, and is nowhere near the same as having them properly cleaned.

Also, after they are cleaned properly, there is usually a procedure to reset the 'soot buildup ESTIMATE counters' in the ecm, so that it stops assuming they are still clogged up.

That was the first thing I did before messing with the sensors and the tubes. I pulled both the cans off and had them cleaned out and then I went in and did the ash accumulation reset and yeah unfortunately it came back on a few days later. So it’s just kinda weird to me the light came back on. I know the thresholds on these sensors are very minimal so it’s really hard to tell but I did look at everything that had to do with the one box as far as pressure tubes and sensors. So I’m not entirely sure what it can be exactly