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Rawze · 04-17-2025, **(Subject: aftertreatment issues )**

(04-16-2025 )scott441974 Wrote: ...
Yes, I reset the dpf in Insite then performed a regen. Everything cleared and it did good for about 1/2 the day. Then the diff pressure sensor came back. I believe I need to clean the egr and cooler like your article says then go from there. I may be just fighting a losing battle until its all clean.

If it only lasted 1/2 a day, and you did everything right, then the units maybe did not get cleaned properly,.. or would not pas a flow-est. That or maybe the Delta-P sensor (or its piping, or wiring) has issues.

Next time, take them to a proper OEM stealers$it to have them cleaned, that has the machines in house (their own proper machinery), instead of some third-party cleaning service.

Also, has anyone bothered to check the decomp tube for clogging???...
this article may help + talks about the decomp tube ...
https://rawze.com/forums/showthread.php?...69#pid9269

last but not least... ALWAYS, ALWAYS take pictures of the faces of the aftertreatment units whenever you pull them apart, so that there is a record of what was built up on them, and how bad they were, and how long it took them to get that way. Also so that pics can be posted for second opinion as to why they clogged to begin with.

Have you taken them apart a second time to ensure they did not actually clog up that fast?.
Have you verified the rest of the exhaust to ensure it is not blocked somewhere?.
Have you verified the exhaust is not leaking somewhere, causing false/incorrect pressure readings?.

EGR tune-up solves most DPF issues... the engine is what makes the soot .. not the DPF. Also, When is the last time you cleaned or replaced the Doser injector behind the turbo?.

You also did not mention how old the units were / how many miles they had on them, etc. They could very well be simply worn out,.. or could have been cleaned improperly at one point and are now, no good.

And what type of driving do you do?..., city, highway, ec?... do you shift a hole lot.. and do you let the vehicle coast in neutral a lot?. - All those things have an effect on how often it can regen going down the roads.