why my exhausted filter wont clean out

[team RAMrod]

so i drove my truck 125+ miles this mornin at an average speed of 70mph, and with 5 miles left in my trip the 80% filter warning came on. i would imagine that all that driving was enough to re gen the filter but apparently not. can anyone think of a reason that the filter wouldn't clesn itself out during that whole trip?

 

[Tremper126]

Could be an issue in the def system. Not sure mine took a while for it to kick on but eventually it did. If it’s extremely cold it takes a long time to engage

 

[carlhenry]

I don't believe the Def has any thing 2 do with regen it is heat and extra fuel

 

[John]

I don't believe the Def has any thing 2 do with regen it is heat and extra fuel

This is correct. The DEF system is disabled during a DPF regen cycle.

 

[Tremper126]

My bad lol

 

[John]

My bad lol

We're all trying to learn and this forum is a good start.

 

[team RAMrod]

yeah i was thinking the def being frozen might have been an issue also somehow. it was 10 degrees this morning and the truck bearly started.