This page covers the Detroit fault code SPN 5359 FMI 16, the Cylinder #2 Engine Smoothness Control / Quantity Low diagnostic on DD Platform engines. It explains the trigger, the monitored parameter, and the factory troubleshooting flow for GHG14 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 5359 FMI 16 table of contents
- Fault code description and causes
- Monitored parameter and enabling conditions
- Relative Cylinder Compression Test
- Idle Speed Balance (ISB) values
- Fuel line and injector inspection
The fault is caused by low power on cylinder #2. The MCM2.1 adjusts injector pulse for a smooth idle and logs the code when the minimum value is reached. The monitored parameter is Cylinder 2 Fueling Error under Engine Smoothness Control, with a typical duration of 2 seconds, MIL on, and no engine reaction.
Entry conditions are engine speed above low idle, all cylinders active with no fault reactions, and steady speed/torque. Possible causes are cylinder kit failure, valve train failure, lash adjustments, a fuel injector, high pressure fuel line damage from rail to injector, and debris entering the injector.
Applicable truck models
This guide applies to Detroit DD13, DD15 and DD16 engines built to EPA 2007 / GHG14 standards, and is cross-referenced to Series 60 (DDEC VI). The compression test and ISB reading are performed with the diesel diagnostic tool, and injector removal follows Power Service Literature. Manufacturer resources are available at Detroit’s official website.
Who needs this SPN 5359 FMI 16 manual
Fleet technicians and independent shops diagnosing a cylinder #2 misfire or uneven idle on DD Series engines rely on this document to separate a mechanical compression loss from a fueling or high pressure line fault.
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