SPN 2023 FMI 9 is the Detroit DD-Series diagnostic fault code document for the J1939 message is missing from source address 23 (dec) event, published on TruckFaultCodes.com (copyright 2017) and archived as a 1-page PDF in the DiagTechPro library. The document identifies a J1939 message that is missing from source address 23 on the vehicle data network, and routes through battery-voltage, CAN-line and module-configuration checks.
SPN 2023 FMI 9 document details
| Brand | Detroit |
| Model coverage | Detroit DD-Series (DD13, DD15 and DD16), EPA 2007 and later |
| System / group | DD Series (EPA 2007-Current) / DTCs |
| Fault code (SPN) | 2023 |
| Failure mode (FMI) | 9 |
| Emissions calibration | GHG14 |
| Source | TruckFaultCodes.com (copyright 2017) |
| Pages | 1 |
| File size | 0.23 MB |
| Format | |
| Language | English |
The page records the official identifiers so a technician can confirm the exact code and calibration against the diesel diagnostic tool before starting any repair.
Document table of contents
- Fault code identification (SPN 2023 / FMI 9)
- J1939 message missing from source address 23
- Step 1 – Check for multiple codes (SPN 168, SPN 625/FMI 9)
- Controller Area Network (CAN) line repair
- Step 2 – CPC reprogramming check
- ServiceLink module configuration
The procedure begins by checking for multiple codes: Common Powertrain Controller (CPC4) battery-voltage faults on SPN 168, and Motor Control Module (MCM2.1) SPN 625/FMI 9, which points to a Controller Area Network line fault to repair first. If only the J1939 error is present, the technician confirms whether the CPC has been recently reprogrammed and checks its configuration. Where the configuration is correct, ServiceLink is connected to determine which modules are configured for the vehicle and their communication status so the affected module can be followed up correctly.
Applicable truck models
This document applies to Detroit DD-Series diesel engines in the EPA 2007-and-later range, typically the DD13, DD15 and DD16 as covered by the GHG14 calibration shown on the file. Confirm the engine calibration and connector layout for your chassis on the official Detroit engine site before ordering parts.
Who needs this SPN 2023 FMI 9 manual
Technicians diagnosing a missing network message from source address 23 on a Detroit DD-Series truck will use this page to separate a CAN or wiring fault from a module configuration issue.
The complete 1-page PDF is available in the DiagTechPro manuals library, where a free account is required to download it.
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