SPN 3719 FMI 0 — DPF soot load very high — service required
Applies to: Detroit · Navistar · Paccar · Sae · Volvo
DPF soot load very high — service required.
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How serious is it?
Caution. Limp to the next safe stop.
Most likely causes
- Missed regens
- Regen inhibit active
- Short-trip operation
- Sensor reading high
- Failed sensors keeping regen from completing
- Regen inhibited
- Sensor error
First moves (roadside)
- Attempt forced parked regen
- Verify all temperature sensors reading correctly
- If regen fails remove DPF for off-vehicle cleaning
- If fails remove DPF for cleaning/service
- Forced regen
- Service
- Service clean
Common misdiagnoses
- Replacing the DPF (often cleanable)
FAQ
DPF soot load very high — service required.
Caution — Limp to the next safe stop.
The most common cause is: Missed regens. Other possibilities include Regen inhibit active; Short-trip operation; Sensor reading high; Failed sensors keeping regen from completing; Regen inhibited; Sensor error.
Limp to the next safe stop. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Find a mechanic or related guides
General diagnostic guidance for heavy-duty diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack). Not a substitute for a scan-tool diagnosis on your specific truck.