SPN 110 FMI 14 is a Detroit™ temperature-plausibility diagnostic fault code, and this 3-page Detroit DD Series PDF documents the “Coolant Temperature / Engine Oil Temperature Plausibility Fault” condition in full. The monitored parameters are the coolant outlet and oil temperature sensors, and the code enables once oil temperature is above 65C with the engine running for more than 1200 seconds. Diagnosis verifies the engine reaches operating temperature, then checks the sensor connectors and resistance. The summary below sets out the official causes, tools and troubleshooting order so a technician can verify the code before downloading the complete manual.
Official document details
| Brand | Detroit |
| Model coverage | DD Series (EPA 2007-Current) |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Publication no. | Not printed on sheet (Detroit™ via TruckFaultCodes.com, © 2017) |
| Year / Revision | 2017 |
| Pages | 3 |
| File size | 0.4 MB |
| Format | |
| Language | English |
SPN 110 FMI 14 document contents
- Fault code identification (SPN and FMI)
- Monitored parameters and enabling conditions
- Cooling-system and oil-level checks
- Operating-temperature verification
- Sensor connector inspection and resistance test
Applicable truck models
The procedure applies to Detroit DD Series diesel engines across all model years using coolant outlet and engine oil temperature sensors. The diagnostic tool and a temperature-resistance chart are required. For factory service data, wiring diagrams and bulletins beyond this fault-code sheet, consult the official Detroit Diesel support site.
Who needs this SPN 110 FMI 14 manual
Technicians diagnosing an implausible temperature reading on a Detroit engine need this sheet to confirm the thermostat and sensors before replacing parts. It is useful when coolant and oil temperatures disagree.
The routine has you repair cooling-system issues and correct oil level, warm the engine to operating temperature, inspect the coolant outlet and oil temperature sensor connectors, then compare sensor resistance against the chart and replace any sensor out of range.
The full 3-page PDF is available in the DiagTechPro manuals library; a free account is required to download it. Every document in the library is indexed by suspect parameter number and failure mode identifier, so you can cross-reference related Detroit DD Series fault codes without leaving the page.
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