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SPN 411 FMI 0 — EGR diff pressure high
SeriousEnginePower derate likely — plan to stop soon
Applies to: Navistar · Paccar · Volvo · MaxxForce 13 notorious EGR cooler issues
EGR diff pressure high.
Don't risk it — get a diesel tech on the truck.
Look up listed providers near you and give them this SPN/FMI when you call.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Plugged cooler
- Pressure lines
- Pressure hoses
- Plugged EGR cooler
- EGR cooler restricted
- Sensor hoses
First moves (roadside)
- Inspect
- Inspect EGR cooler and hoses
- Check EGR cooler and hoses
FAQ
What does SPN 411 FMI 0 mean?
EGR diff pressure high.
How serious is SPN 411 FMI 0?
Serious — Power derate likely — plan to stop soon.
What's the most likely cause of SPN 411 FMI 0?
The most common cause is: Plugged cooler. Other possibilities include Pressure lines; Pressure hoses; Plugged EGR cooler; EGR cooler restricted; Sensor hoses.
Can I keep driving with SPN 411 FMI 0?
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
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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.