SPN 411 FMI 0 — EGR diff pressure high
What it means: EGR diff pressure high.
How serious / can you keep driving: Serious. Power derate likely — plan to stop soon.
Check first: Inspect
Don't risk it — look up listed providers near you and give them this SPN/FMI when you call.
Listed providers nearest Salt Lake City, UT
Closest first. Tell them SPN 411 FMI 0 and what the truck is doing. RoadService.app lists these providers and does not employ them or carry out the repair.
- 0.0 mi away — based in Salt Lake City, UT · (801) 531-9256
- 0.0 mi away — based in Salt Lake City, UT · (385) 503-8084
- 0.0 mi away — based in Salt Lake City, UT · (385) 386-4700
Applies to: Navistar · Paccar · Volvo · MaxxForce 13 notorious EGR cooler issues
What SPN 411 FMI 0 means
EGR diff pressure high.
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
EGR diff pressure high.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Plugged cooler. Other possibilities include Pressure lines; Pressure hoses; Plugged EGR cooler; EGR cooler restricted; Sensor hoses.
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Related codes
Codes that commonly appear alongside SPN 411 FMI 0, or share the same subsystem.
- EGR diff pressure — erratic (SPN 411 FMI 2)
- EGR Differential Pressure — Voltage High (SPN 411 FMI 3)
- SCR Operator Inducement — Severe Derate Active (SPN 5246 FMI 0)
- Aftertreatment 1 Diesel Particulate Filter Differential Pressure - Data Valid But Above Normal Operating Range, Most Severe Level (DPF severely restricted / plugged) (SPN 3251 FMI 0)
- Aftertreatment 1 Diesel Exhaust Fluid Quality - Data Valid But Below Normal Operating Range, Most Severe Level (DEF quality/concentration incorrect) (SPN 4364 FMI 1)
- DPF Differential Pressure — Data Erratic (SPN 3251 FMI 2)
- DEF Dosing Unit — Not Responding Properly (SPN 3361 FMI 7)
- SCR Conversion Efficiency — Below Threshold (SPN 4364 FMI 18)
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.