SPN 3246 FMI 16 is the Detroit DD Series (EPA 2007-current) diagnostic fault sheet for the DPF outlet temperature high (silent fault) condition on the DPF outlet temperature sensor circuit. It explains that this is a silent fault with no dashboard warning lamp, how to rule out related codes such as SPN 3246/FMI 0 and FMI 8, and how to complete a parked regeneration before clearing codes. The sheet is written for heavy-duty technicians who pull this diagnostic trouble code with a diesel diagnostic tool and need the confirmed factory step order rather than guesswork.
SPN 3246 FMI 16 document details
| Brand | Detroit (Detroit Diesel) |
| Model coverage | DD13, DD15 and DD16 — DD Series (EPA 2007-current) |
| System / Group | DPF outlet temperature sensor / DTCs |
| Fault code | SPN 3246 / FMI 16 |
| Emissions platform | EPA07 |
| Source | TruckFaultCodes.com fault-code reference (© 2017) |
| Pages | 2 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification — SPN 3246, FMI 16
- DPF outlet temperature high — silent fault note
- Checking for related SPN 3246 codes
- Extended data occurrence counter check
- Parked regeneration and clearing codes
Applicable truck models
This DPF outlet temperature high (silent fault) procedure applies to Detroit DD13, DD15 and DD16 engines built on the DD Series (EPA 2007-current) aftertreatment platform (EPA07 calibrations) and is cross-listed for Series 60 DDEC VI (EPA 2007) installations that share the same DPF outlet temperature sensor. Removal and installation callouts refer to Detroit Power Service Literature, and the Detroit Customer Support Center (800-445-1980) is the authoritative escalation point. Full model and engine coverage is confirmed on the Detroit Diesel official website.
Who needs this SPN 3246 FMI 16 manual
Workshop owners, mobile diesel technicians and fleet maintenance teams reach for this manual the moment a scan tool reports SPN 3246/FMI 16. It keeps the diagnosis on the manufacturer’s confirmed path, which shortens repair time and avoids replacing a good DPF outlet temperature sensor. The complete PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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