The Detroit DEF pressure duty fault sheet is the official Detroit DD Series diagnostic for a high DEF pressure duty-cycle reading during dosing, stored under SPN 3361 FMI 0 for EPA10 calibrations. It records the monitored parameter DEF pressure, exactly as published by TruckFaultCodes.com (© 2017).
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | Detroit DD Series diesel engines (EPA 2007-current) |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Fault code | SPN 3361 / FMI 0 |
| Fault condition | Diesel Exhaust Fluid (DEF) Pressure Duty Cycle High |
| Monitored parameter | DEF pressure |
| Emissions calibration | EPA10 |
| Source / Publisher | TruckFaultCodes.com |
| Year / Revision | 2017 |
| Pages | 5 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification: SPN 3361, FMI 0
- Description and monitored parameter
- Typical enabling conditions
- Troubleshooting steps
- Component inspection and repair verification
Detroit DEF pressure duty troubleshooting steps
The sheet monitors DEF pressure while dosing is enabled, has the technician check the pump, pressure line and metering unit for an over-pressure condition, and confirms the repair against the diesel diagnostic tool readings.
Applicable truck models
This code sheet applies to trucks powered by Detroit DD Series diesel engines built to the EPA10 emissions calibration; always match the SPN 3361 FMI 0 listing to the vehicle’s own engine family before repair. Confirm the emissions family on the vehicle emissions label, because aftertreatment and dosing hardware differs between the EPA07, EPA10 and GHG14 builds and a mismatched procedure can send you to the wrong component. For engine coverage and dealer service information, see the Detroit Diesel official website.
Who needs this Detroit DEF pressure duty manual
Fleet technicians and independent workshops that service Detroit DD Series engines use this DEF pressure duty reference to confirm the code, its enabling conditions and the correct repair before replacing parts. It is written for the mechanic making the repair decision, not the driver, and pairs with the wiring diagrams and component removal procedures Detroit publishes in Power Service Literature.
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