One box issues

2014 Cascadia. 14 liter Detroit. 12 speed auto. Everything this 30 year trucking vet cannot stand. If it wasn't bought for $11,500 I never would have considered it.
After air gismo in tranny caused a 3,000 rpm rev between 10th and 11th gear, a starter fail, a radiator disintegrated on I 35, an overhead valve adjustment never performed by previous fleet owner in 600,000 miles, the one box def system failed.
Both input and output NOX sensors were replaced along with both filters 3 months ago.
Now the issue is incomplete regen when the one box is hot.
I have to allow it to cool completely then do a parked regen for the system to complete a full cycle.
Has anyone ever encountered such demons?

 

Added information. This was a former fleet team truck, I suspect it was never shown any mercy.
I am rather disgusted with Freightliners "one box" system for other reasons.
Think a moment.
If these trucks are truly "clean idle" why is it necessary to get up in the middle of a sleep period to restart the truck and perform a parked regen?
If this truck can be idled, why wasn't a program written to perform this task automatically as it does going down the road?
I suspect it's all marketing gimmick, the entire system, installed to accomodate some snowflake micro-#####'s idea of Clean Air Act compliance.
You tell me.

 

Also further info before the unknowable react.
The Freightliner "one box" system consists of a plastic elbow diverting exhaust gasses to the box.
Exhaust enters the first chamber and is measured for NOX by a sensor.
The gas then is pushed through 2 large filters to a back chamber where it is dosed with DEF.
The exhaust then is pushed forward to a lower chamber in the "one box" onto a non-replaceable selective catalytic converter.
Then it exits to a tailpipe.
There are no mechanical systems in the "one box" to fail.
Still, this truck when box is hot either by high ambient temperatures, the weather, or by the engine running rattles like it's being pounded by a ball peen sledgehammer.
Doesn't do it when the "One Box" is completely cool.
As a former aerospace test engineer this unreported condition makes me suspect the system was the product of supplier bribes.
The overall value of the truck suffers from shoddy workmanship.
We should never have to tolerate the mandated denial of our purchasing options.

 

INCLEAL13: thank you for that insight.
I would then ask why Freightliner shops are completely unaware of this.
But recalling the caliber of many Freightliner shops, I suppose I could answer my own question.

 

When the system is replaced that should count as "maintenance".
I had no control what previous owner didn't do.
The issue here really is a faulty product in the beginning.
All ridiculous comments about "throw away" trucks aside...all trucks eventually end up in some landfill someplace, there's nothing new under the sun with any diesel engine.
Just more gismos.