This page covers the Detroit fault code SPN 5323 FMI 13, Excessive Time To Enter Closed Loop Fuel Pressure Control, on DD Platform engines. It documents the causes, the fuel system integrity check, and the detailed 24-step troubleshooting flow.
Official document details
| Brand | Detroit |
| Model coverage | Detroit DD13, DD15 and DD16 (DD Platform) |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Source | TruckFaultCodes.com |
| Year / Revision | 2017 (GHG14) |
| Pages | 8 |
| File size | 0.47 MB |
| Format | |
| Language | English |
SPN 5323 FMI 13 table of contents
- Fault description and causes
- Fuel level and contamination checks
- Pressure Limiting Valve open counts
- Automatic Fuel System Integrity Check
- High pressure pump and MCM tests
The Motor Control Module (MCM) monitors rail pressure and sets the code when rail pressure stays below 200 Bar for too long at start-up. Listed causes include external fuel leakage between the high pressure pump and injectors, internal pressure limiting valve (PLV) leakage, fuel filter integrity, fuel supply and aeration issues, intermittent loss of engine speed signal, high pressure pump internal failure, injector leakage, fuel contamination, a faulty rail pressure sensor, or the MCM itself.
The flow covers fuel level and contamination checks, PLV open counts, the Automatic Fuel System Integrity Check (FSIC), rail pressure bleed-off timing, Idle Speed Balance values, the aerated fuel test, the PLV flow test, and high pressure pump and MCM verification.
Applicable truck models
This guide applies to Detroit DD13, DD15 and DD16 engines with the Three-Filter fuel system under EPA 2007 / GHG14. Many steps reference the Detroit Customer Support Center (800-445-1980) and Power Service Literature. Manufacturer resources are at Detroit’s official website.
Who needs this SPN 5323 FMI 13 manual
Experienced diesel technicians diagnosing hard starting, low rail pressure or aerated fuel on DD Series engines rely on this in-depth guide to work the FSIC log and confirm the failing fuel component.
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