The 3250 FMI 15 GHG14 fault code file is a Detroit GHG14 diagnostic sheet covering a Diesel Oxidation Catalyst (DOC) outlet temperature high condition on DD Series engines. Compiled by TruckFaultCodes.com (© 2017) from Detroit Power Service Literature, this 5-page PDF gives technicians the exact troubleshooting order for DTC 3250-15. It is a field reference, not a substitute for the full factory manuals.
Official document details
| Brand | Detroit (Detroit Diesel) |
|---|---|
| Model coverage | DD13, DD15, DD16 |
| System / group | DD Series (EPA 2007-Current) — DTCs |
| Diagnostic code | DTC 3250-15, emission level GHG14 |
| Fault name | DOC Outlet Temperature High |
| Pages | 5 |
| File size | 0.3 MB |
| Format | |
| Source | TruckFaultCodes.com, from Detroit Power Service Literature |
| Language | English |
3250 FMI 15 GHG14 fault summary
It confirms an overheated DOC outlet on GHG14 hardware, checks the sensor and ACM2.1 wiring, runs an Idle Speed Balance Test and inspects the DPF before a parked regeneration and ash reset. Every step is laid out as a Yes/No decision branch, so you can follow the same path a Detroit dealer technician would without guessing.
- Monitoring DOC outlet temperature against 760C / 1400F
- DOC inlet versus outlet temperature comparison
- DOC outlet sensor and ACM2.1 harness inspection
- Idle Speed Balance Test
- Removing the GHG14 1-BOX or Two-Box (2V2) device
- Contamination checks, parked regen and ash reset
Applicable truck models and engines
This procedure applies to Detroit DD13, DD15 and DD16 engines in the DD Series (EPA 2007-Current) family. The GHG14 procedure is built around the Aftertreatment Control Module (ACM2.1). For engine specifications and dealer support, see the official Detroit engine support site.
Who needs this 3250 FMI 15 GHG14 manual
Fleet technicians, mobile diesel mechanics and DD Series owners diagnosing this code with a diesel diagnostic tool such as DDDL or DDRS will find the exact step order, pin numbers and pass/fail limits they need. Keep it beside the truck during the repair.
The complete 5-page PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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