This page covers the Detroit fault code SPN 5360 FMI 16, the Cylinder #3 Engine Smoothness Control / Quantity Low diagnostic on DD Platform engines. It documents what triggers the code, the monitored parameter, and the factory troubleshooting sequence for GHG14 emissions builds.
Official document details
| Brand | Detroit |
| Model coverage | Detroit DD13, DD15, DD16 and Series 60 (DDEC VI) |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Source | TruckFaultCodes.com |
| Year / Revision | 2017 (GHG14) |
| Pages | 3 |
| File size | 0.29 MB |
| Format | |
| Language | English |
SPN 5360 FMI 16 table of contents
- Fault code description and causes
- Monitored parameter and enabling conditions
- Relative Cylinder Compression Test
- Idle Speed Balance (ISB) check
- High pressure fuel line inspection
The code sets when there is low power on cylinder #3. The MCM2.1 adjusts injector pulse for a smooth idle, and this fault is logged once the minimum fueling value is reached. The monitored parameter is Cylinder 3 Fueling Error, the enabling condition is Engine Smoothness Control, typical duration is 2 seconds, and the MIL is illuminated with no engine reaction.
Entry conditions are engine speed above low idle, all cylinders active with no fault reactions, and steady engine speed/torque. Listed causes include cylinder kit failure, valve train failure, lash adjustments, a faulty fuel injector, high pressure fuel line damage (rail to injector), and debris entering the injector on intermittent faults.
Applicable truck models
This document applies to Detroit DD Platform diesel engines – DD13, DD15 and DD16 – built to EPA 2007 / GHG14 standards, and it is also cross-referenced to Series 60 (DDEC VI) applications. All diagnostic steps use the diesel diagnostic tool and reference Power Service Literature for injector and fuel line removal. For engine specifications and dealer support, see Detroit’s official website.
Who needs this SPN 5360 FMI 16 manual
Heavy-duty diesel technicians and workshop owners chasing a rough idle or cylinder-balance concern on DD Series engines will use this guide to confirm whether the issue is mechanical compression, a fuel injector, or a high pressure line before parts are replaced.
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