Do I ever need to do a manual parked regen without the truck asking for it?

Ya man I feel ya, like some just mentioned it's possible the DPF pressure sensor is bad. Mine went out on Easter weekend. Normally they get soot/moisture in them, you could try taking that off and taking a paper towel, stuff it in both holes to absorb the moisture... Being a company truck though, might be best to let them handle it...

How far are you from the house?

Here is what the DPF pressure sensor looks like, not sure about international but on my Peterbilt its right behind the huge aftertreament filter on the passenger side...

 

Well good luck. Let us know how it pans out.

 

Regen on diesel engines is a process that cleans the exhaust pollution (also known as soot) from the diesel particulate filter (DPF) by using heat, chemical reaction, or electricity
Your error is SCR, Selective Catalyst Reduction. It is the last piece in the aftertreatment system before the exhaust goes out the pipe. The SCR is a catalytic converter similar to one in a car to reduce NOx emissions. The DEF fluid injected into the exhaust also helps to reduce NOx.
I doubt a regen would get an SCR error to away even if you could do one.

 

loves doing warrenty work.. that is a nightmare i dont want to experience

 

Out of curiosity what is the engine and transmission and RAR?

 

I know on my 16 Cascadia you can't do a parked Regen without it calling for one, it has to be hooked to a computer to do a forced Regen.