SPN 111 FMI 19 is a Detroit™ coolant-level diagnostic fault code, and this 1-page Detroit DD Series PDF documents the “Coolant Level Low” condition in full. This single-page sheet covers a low engine coolant level report on GHG14 engines. Diagnosis starts by confirming MCM2.1, ACM2.1 and CPC4 software levels are 7.6/8.6/R22 or higher, then verifies the reservoir level and the engine coolant level sensor. 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 | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
SPN 111 FMI 19 document contents
- Fault code identification (SPN and FMI)
- Software-level verification (MCM2.1, ACM2.1, CPC4)
- Multiple-code check
- Coolant reservoir level check
- Engine coolant level sensor replacement
Applicable truck models
The procedure applies to Detroit DD Series diesel engines on the GHG14 emissions platform, and calls out EPA10-and-newer software requirements. Only the diagnostic tool and a visual reservoir check are needed. For factory service data, wiring diagrams and bulletins beyond this fault-code sheet, consult the official Detroit Diesel support site.
Who needs this SPN 111 FMI 19 manual
Technicians seeing a coolant-level warning that may be software-related need this sheet to reprogram to the correct level before replacing the sensor. It is a quick reference for shops confirming a false low-coolant report.
The routine has you confirm controller software levels, clear faults, then check the reservoir; a level within limits with the fault still present points to replacing the engine coolant level sensor.
The full 1-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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