SPN 102 FMI 0 — Boost pressure high
What it means: Boost pressure high.
How serious / can you keep driving: Serious. Power derate likely — plan to stop soon.
Check first: Scan live data actual vs commanded boost
Don't risk it — look up listed providers near you and give them this SPN/FMI when you call.
Listed providers nearest Albuquerque, NM
Closest first. Tell them SPN 102 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 Albuquerque, NM · (505) 226-2125
- 0.0 mi away — based in Albuquerque, NM · (505) 823-9696
- 0.0 mi away — based in Albuquerque, NM · (505) 220-3541
Applies to: Detroit · Navistar · Volvo
What SPN 102 FMI 0 means
Boost pressure high.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Overboost
- Stuck VGT vanes
- Wastegate issue
- Stuck VGT
- VGT stuck closed
First moves (roadside)
- Scan live data actual vs commanded boost
- Check VGT operation
- Compare actual vs commanded
- Live data comparison actual vs commanded
FAQ
Boost pressure high.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Overboost. Other possibilities include Stuck VGT vanes; Wastegate issue; Stuck VGT; VGT stuck closed.
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 102 FMI 0, or share the same subsystem.
- Boost sensor — voltage low (SPN 102 FMI 4)
- Boost Pressure Sensor — Voltage High (SPN 102 FMI 3)
- 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)
- Intake manifold temp — voltage high (SPN 105 FMI 3)
- Intake manifold temp — voltage low (SPN 105 FMI 4)
- Injection control pressure low (HEUI — older engines) (SPN 164 FMI 1)
Same symptom: Low boost / low power
Other air-path codes that arrive as a truck that will not pull the hill it pulled yesterday.
- Turbo boost pressure high (SPN 1127 FMI 0) · Engine
- Turbo compressor inlet temp high voltage (SPN 1172 FMI 3) · Engine
- Turbo compressor inlet pressure — high voltage (SPN 1176 FMI 3) · Engine
- VGT actuator position — not responding (SPN 2795 FMI 7) · Engine
- VGT position — not responding (similar to 2795) (SPN 5571 FMI 7) · Engine
- Turbo turbine inlet temp — high voltage (SPN 5856 FMI 3) · Engine
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.