SPN 110 FMI 16 — Coolant temperature — moderately high
What it means: Coolant temperature — moderately high.
How serious / can you keep driving: Serious. Power derate likely — plan to stop soon.
Check first: Check level/thermostat/fan
Don't risk it — look up listed providers near you and give them this SPN/FMI when you call.
Listed providers nearest Houston, TX
Closest first. Tell them SPN 110 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 Houston, TX · (832) 377-0578
- 0.0 mi away — based in Houston, TX · (713) 219-9090
- 0.0 mi away — based in Houston, TX · (713) 671-9751
Applies to: Detroit
What SPN 110 FMI 16 means
Coolant temperature — moderately high.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Cooling issue
- Fan clutch
- Thermostat
First moves (roadside)
- Check level/thermostat/fan
FAQ
Coolant temperature — moderately high.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Cooling issue. Other possibilities include Fan clutch; Thermostat.
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 110 FMI 16, or share the same subsystem.
- Engine Coolant Temperature — Too High (SPN 110 FMI 0)
- Coolant temp sensor — voltage high (SPN 110 FMI 3)
- Coolant temp sensor — voltage low (SPN 110 FMI 4)
- Coolant level — low (SPN 111 FMI 1)
- Engine Coolant Over-Temperature Condition (P0217)
- Coolant Thermostat Below Regulating Temperature (P0128)
- Fan 1 Control Circuit Malfunction (P0480)
- Fan 2 Control Circuit Malfunction (P0481)
Same symptom: Running hot
Other codes that show up as coolant temperature climbing or a hot-engine lamp.
- Engine Coolant Temperature Sensor 1 Circuit (P0115) · Cooling
- Engine Coolant Temperature Sensor Range (P0116) · Cooling
- Engine Coolant Temperature Sensor Circuit Low (P0117) · Cooling
- Engine Coolant Temperature Sensor Circuit High (P0118) · Cooling
- Engine Coolant Temperature Sensor Intermittent (P0119) · Cooling
- Fan drive — voltage high (SPN 647 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.