SPN 2042 FMI 9 is the Detroit DD-Series diagnostic fault code document for the J1939 message is missing from source address 42 (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 42 on the vehicle data network, and works through battery-voltage, CAN-line and module-configuration checks.
SPN 2042 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) | 2042 |
| 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 2042 / FMI 9)
- J1939 message missing from source address 42
- 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 SPN 625/FMI 9, which indicates a Controller Area Network line fault to repair first. If only the J1939 error remains, the technician confirms whether the CPC has been recently reprogrammed and checks its configuration. When the configuration is correct, ServiceLink is connected to determine which modules are configured for the vehicle and their communication status, guiding the correct module troubleshooting procedure.
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 2042 FMI 9 manual
Technicians tracing a dropped network message from source address 42 on a Detroit DD-Series truck will use this page to isolate a CAN or wiring fault from a configuration error.
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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