SPN 174 FMI 16 — Fuel temperature high
What it means: Fuel temperature high.
How serious / can you keep driving: Serious. Power derate likely — plan to stop soon.
Check first: Check return line flow
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 174 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 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: Volvo
What SPN 174 FMI 16 means
Fuel temperature high.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Restricted return
- Fuel cooler (if equipped)
- Hot fuel
First moves (roadside)
- Check return line flow
- Top off tank
FAQ
Fuel temperature high.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Restricted return. Other possibilities include Fuel cooler (if equipped); Hot fuel.
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 174 FMI 16, or share the same subsystem.
- 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)
- Intake manifold temp — voltage low (SPN 105 FMI 4)
- Injection control pressure low (HEUI — older engines) (SPN 164 FMI 1)
Same symptom: Fuel delivery
Other codes on the tank-to-injector path — pressure, filters, water and the pump.
- Injector Metering Rail 1 Pressure - Data Valid But Below Normal Operating Range (XPI common rail fuel pressure too low) (SPN 157 FMI 1) · Fuel System
- Fuel System Leak Detected - Large Leak (P0093) · Fuel System
- HP Fuel Rail Pressure Low During Power Enrichment (P1093) · Fuel System
- High-Pressure Fuel System Relief Valve Open (P2BAD) · Fuel System
- Lost Communication with Fuel Injector Control Module (U0105) · Electrical, Charging & Network
- Injector Metering Rail 1 Pressure - Data Valid But Above Normal Operating Range (XPI common rail fuel pressure too high) (SPN 157 FMI 0) · Fuel System
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.