SPN 520267 FMI 17 is the Detroit Diesel fault-code service sheet that documents an MCM2.1 engine-hours data reading that is erratic, intermittent or incorrect. It explains why the code sets after a control-module reprogramming event and how a technician should respond. This DiagTechPro library page summarizes what the 1-page PDF contains so a technician can confirm it is the right document before downloading.
Official document details
| Brand | Detroit (Detroit Diesel) |
|---|---|
| Model coverage | DD Series (EPA 2007-Current); Series 60 DDEC VI (EPA 2007) |
| System / group | GHG14 diagnostic trouble codes |
| Suspect Parameter Number | 520267 |
| Failure Mode Identifier | 17 |
| Source | TruckFaultCodes.com, © 2017 |
| Pages | 1 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification: SPN 520267
- Affected control modules: MCM2.1 and CPC4
- Note on shared suspect parameter numbers
- Cause: internal clock mismatch after reprogramming
- Required action: clear all fault codes
SPN 520267 FMI 17 diagnostic summary
The sheet notes that the Common Powertrain Controller (CPC4) digital outputs share the same suspect parameter number as some Motor Control Module (MCM2.1) faults, and the diesel diagnostic tool distinguishes between the CPC4 and the MCM2.1 when diagnosing the concern. This code usually appears after the CPC4 or MCM2.1 has been reprogrammed, because the internal clocks of the two modules no longer match. After reprogramming either module, all fault codes must be cleared for the reading to correct itself.
Applicable Detroit truck models
This fault-code sheet applies to Detroit DD Series engines certified to EPA 2007 and later emissions standards, and it is cross-listed under the Detroit Series 60 (DDEC VI, EPA 2007) diagnostic set. For full engine specifications and support details, see the official Detroit website.
Who needs this SPN 520267 FMI 17 manual
Detroit technicians and workshop owners who service DD Series and Series 60 engines need this reference whenever an engine-hours discrepancy follows a module flash, so they can clear codes correctly instead of replacing hardware.
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