SPN 190 FMI 16 — Engine overspeed
What it means: Engine overspeed.
How serious / can you keep driving: Serious. Power derate likely — plan to stop soon.
Check first: Inspect for oil ingestion — turbo runaway is urgent
Don't risk it — look up listed providers near you and give them this SPN/FMI when you call.
Listed providers nearest Louisville, KY
Closest first. Tell them SPN 190 FMI 16 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 Louisville, KY · (502) 773-1159
- 0.0 mi away — based in Louisville, KY · (502) 447-1234
- 0.0 mi away — based in Louisville, KY · (502) 648-6725
Applies to: Detroit · Navistar · Paccar · Volvo
What SPN 190 FMI 16 means
Engine overspeed.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Downhill overspeed
- Turbo runaway (serious)
- Downhill
- Turbo runaway
First moves (roadside)
- Inspect for oil ingestion — turbo runaway is urgent
- Inspect
- Inspect oil ingestion
- Inspect for oil ingestion
FAQ
Engine overspeed.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Downhill overspeed. Other possibilities include Turbo runaway (serious); Downhill; Turbo runaway.
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 190 FMI 16, or share the same subsystem.
- Engine speed sensor — erratic (SPN 190 FMI 2)
- Engine speed signal abnormal update rate (SPN 190 FMI 9)
- Engine Protection — Power Derate Active (SPN 1569 FMI 31)
- Intake Manifold (Charge Air) Temp — High (SPN 105 FMI 0)
- Turbo Boost Pressure — High / Overboost (SPN 1127 FMI 16)
- Boost pressure high (SPN 102 FMI 0)
- Boost sensor — voltage low (SPN 102 FMI 4)
- Intake manifold temp — voltage high (SPN 105 FMI 3)
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.