DD15 Regen help!!

I'm havin problems with the check engine coming on for a certain amount of time, 09 cascadia w/dd15. After that the regen light comes on. About 250k miles ago a mechanic I was going to scanned my truck when I went in with a check engine light complaint. He got some numbers from the dpf, inserted them into his laptop and basically reseted the maintenance interval for my dpf. Sort of like what you do to your car's maintenance light when you change the oil.
I need to go to this mechanic to do it again to confirm.
I'll keep y'all posted.

 

Careful with that.

I too have an 09 Cascadia with a DD15. The CEL is supposed to come on when you reach 300K miles after the last DPF service. They can reset it for another 150K miles, but only one time. They are supposed to measure the ash content before they reset it and only do the reset if the ash content is not too high. If you press you luck with the DPF filter you can destroy the filter, which is about $1500 to replace, plus a $2500 core charge. You can also ruin the DOC or possibly even blow a head gasket.

I did the 300K mile reset on mine (had Diesel Doctor do it for me). I only got another 40K miles before it started having problems. It started throwing 3556 code (blocked doser), it started emitting fumes into the cab, and it started requesting parked regens every other day. I had to use the DDDL software to force a doser purge before each regen or the regen would fail.

I just picked it up from Freightliner today. $2100. I bought a new filter instead of trying to clean the old one. It had measured 75% ash content. The truck ran good on the way home so I'm hoping I've dodged a bullet. It was a mistake to reset the ECM just because I didn't want to spend the money at the time. These emissions systems are junky and fragile and it's best not to push your luck with them.

 

I took mine to a local shop and he didn't find anything wrong.
It regened just fine so he said it might be that I need to bake my doc and dpf or the engine is making too much smoke.
I'm going to bake the whole thing before I replace the injectors. What ever is least expensive right?

 

I would advocate doing the reman of Detroit's DPF. They have a 95% success rate if caught in time vs the bake&blow of 30-60% success rate. EPA07 is based on mileage while EPA10 is based on fuel usage. The more idling you do, the more ash you accumulate. The EPA10 strategy really helps the guys who do more line haul rather than city driving or excessive idling. The more load you put on your engine, the better the aftertreatment works (obviously below overheating ATS components).

There are also other potential dangers of just resetting the DPF ash code. Like getting an overtemp which hurts the DPF and things down the line, aka the SCR. And with an SCR, you have to replace the whole unit which is nearly $20k I think I last heard?? Very expensive--I don't remember the exact numbers. In addition, excessive ash in the DPF actually causes poorer NOx conversion. The excessive temp will cause the precious metals to contaminate the SCR. So in reality, the EPA07 trucks are more prone to a weaker ATS than the EPA10. So it's more crucial for the EPA07 trucks to get their DPFs serviced/replaced and done so the right way in order to avoid NOx efficiency codes and protect the SCR.

I can only stress not taking any chances with the ATS and changing out the DPF when it reports high ash.

 

EPA 07 does not use SCR

 

Yup, you're right. EPA10 is when SCR was introduced. My emphasis was on 1-box specifically.

 

put scangauge on dash, set it up to monitor DOC inlet temp and you will not have toasted aftertreatment components.

 

Hey guys Same problem low boost when trying to do passive regen take about 1 -2 hours before it gets better but take a lot of fuel fuel injector replace I thought maybe injector stuck open now I'm thinking muffler block