Home › Fault codes › SPN 787 FMI 7
SPN 787 FMI 7 — Shift finger not moving to commanded position
SeriousTransmissionPower derate likely — plan to stop soon
Applies to: Eaton · Volvo
Shift finger not moving to commanded position.
Don't risk it — get a diesel tech on the truck.
Your SPN/FMI rides along, so nearby mechanics see the fault before they quote you.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Mechanical bind
- Actuator
- Air/hydraulic
- Shift mechanism
- Air
First moves (roadside)
- Inspect shift finger
- Inspect shift mechanism
FAQ
What does SPN 787 FMI 7 mean?
Shift finger not moving to commanded position.
How serious is SPN 787 FMI 7?
Serious — Power derate likely — plan to stop soon.
What's the most likely cause of SPN 787 FMI 7?
The most common cause is: Mechanical bind. Other possibilities include Actuator; Air/hydraulic; Shift mechanism; Air.
Can I keep driving with SPN 787 FMI 7?
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
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.