There are four stages of DPF warnings, namely:
1. DPF Lamp ON, manual states 2-6 hours of driving, but Freightliner instructor say 1:15 hrs. driving. Action: Parked Regeneration.
2. DPF Lamp Flashing; manual states 1-2 hrs driving. Action: Parked Regeneration
3. DPF Lamp Flashing and Check Engine Light; manual states regeneration immediately.
4. DPF Lamp Flashing, Check Engine Light on and Red Stop Engine Light On. Manual states "Stop Engine Immediately and take to authorized Cummins repair location". At this point, the after treatment system and engine could be damaged,.
You do not ever want to get to a Red Stop Engine Light!
Gale & Hank- 2012 Berkshire 390BH