Dd15 won't complete regen

Needs to be removed and cleaned or replaced.

 

Yes, the DPF filter. Has it even been cleaned? How many miles since cleaning? Many say clean 200 -400k miles.
"Pressure pipes look clear." Blow through the pipe to make sure it is clean and not plugged.
In the other thread you commented in, High Soot Level DD15, read post #5.

 

What is the actual code?
Have you followed the troubleshooting steps?

 

What does the DOC inlet pressure max out at during a regen?
What year is your truck and engine?
What does the error code page look like? Let's see all the codes.

My first guess would be that it's simply time to do a DPF cleaning. How long has it been? There is a page in the DDDL software that will tell you the percent filled the filter is. It's under the Actions drop down. I prefer just replacing the filters with reman filters from the dealer instead of risking having one crack during cleaning.

"I cleaned the Delta P, can't get the temp sensors off the dpf as they are rusted on. But it's Reading temps so I don't think that's it."

It's not. Delta-P and temp sensors have nothing to do with this.

"Anyone know how long you can drive once the dpf light starts flashing? How many times can I hit the shut down override? Lol"

Are you getting an engine shut down light or just a DPF light? If it's trying to shut you down I'd be heading to the nearest dealership. If it's just a DPF light I'd head home and then address it.

Is it derated?

You can change the speed limits that happen during a derate in the paramers tab. It's under the CPC section. The sub-section is called "Common Limiters". The parameters that matter are the three DEF derate stages. Those actually apply to all derates. There will still be a slight torque reduction during a derate and there will be dash lights but there is no parameter you can change to avoid these.