Aftertreatment system

My 1st guess would be the dpf injector...

 

what is a dpf injector

 

Also called the 7th injector.. it an injector inside the dpf... it injects diesel into the dpf to burn off the soot.. this is what happens when the truck is doing a regen.. if it's not working right it won't spray the right amount of diesel, the truck will think its doing a regen but it's not getting hot enough to really do it.. so 1/2 hr to 4 hr later it wants another parked regen because the last 1 didn't really didn't work.

If the truck is asking for multiple parked regens a day or every few days this is most likely the problum and the 1st thing to check.

My truck has 875k and I have never had
the request parked regen light come on..
But I also use "pittsburgh power max mileage" in my truck. I didn't even have the filter baked till it had 850k...

 

Hate it when the OP asks a question like this then disappears without giving the final solution to the problem. Hell, maybe he's still doing parked regens months later.

 

This post sent me down a rabbit hole..... wouldn't it be nice not to have to deal with EGR, sensor and DPF issues? Anyway, given PP's pretty terrible reviews, I went ahead and started looking at the SDS sheets for both Max Mileage and Diesel Kleen from Power Service. I'm not a degreed chemist, but the chemical makeup of the two products seem quite similar. Given that Diesel Kleen has a good reputation and a stamp of approval from Cummins, that's the route I'm going. They make a concentrated version in a 2.5 gallon jug which only needs about 13 oz per 180 gallon fill up, so a short cup on each side. Easy-peezy. Works out to 3.8 c/gallon, vs about 10 c/gallon on the consumer concentration sold at the truck stops.