It's not a "forced" regen, it's a parked regen. You're not forcing the tractor to do anything. Also, an "auto regen" is possible at PM warning level 1, 2-1 and 2-2 if the DPF INHIBIT button on the dash is off. If the DPF INHIBIT button on the dash is illuminated (on) you're overriding auto regen and you might get a parked regen warning light come on in the cluster to tell you that you need to do a parked regen. You can not use the tractor during a parked regen the way you can during an auto regen.correct, if OP tractor between stage 1 and 2-2 you can force it to do a regen
If below stage 1 then it should be automatic.
I think the lack of understanding of the DPF system is the biggest problem with the DPF system.