SPN 4765 FMI 0 is the Detroit DD Series (EPA 2007–Current) diagnostic trouble code that Detroit documents as “Exhaust Temperature High”. This 5-page GHG14 fault-code sheet documents the monitored exhaust-temperature parameter and the full aftertreatment diagnosis, the dash-lamp indication and engine reaction, and the ordered troubleshooting steps used to confirm and clear the condition. The monitored parameter is exhaust temperature, the engine reaction is a 25% derate with the CEL on, and this five-page procedure moves from DOC outlet temperature checks through an idle speed balance test to Aftertreatment Device teardown, referencing the EPA07/10/GHG14 Exhaust-EGR-ATS Manual (DDC-SVC-MAN-0083).
SPN 4765 FMI 0 document details
| Brand | Detroit (Detroit Diesel) |
|---|---|
| Model coverage | Detroit DD Series (EPA 2007-Current) engines |
| System / group | DD Series (EPA 2007-Current) / DTCs |
| Publication / source | Detroit DDC-SVC-MAN-0083 EPA07/10/GHG14 Exhaust-EGR-ATS Manual |
| Emissions family | GHG14 |
| Pages | 5 |
| File size | 0.31 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code description and engine reaction
- Check for additional active fault codes
- DOC outlet temperature monitoring
- DOC inlet versus outlet temperature comparison
- DOC outlet temperature sensor and harness inspection
- Idle speed balance test
- Aftertreatment Device removal and DPF inspection
- Parked regeneration and ash accumulator reset
Applicable truck models
This fault-code procedure applies to trucks powered by the Detroit DD Series (EPA 2007-Current) engines on the DD Series (EPA 2007–Current) platform. After confirming no other codes, the technician monitors the DOC outlet temperature against 760°C, compares DOC inlet and outlet temperatures, inspects the DOC outlet temperature sensor and its harness to the ACM2.1 120-pin connector, runs an idle speed balance test to find a faulty injector, and if needed removes the Aftertreatment Device per DDC-SVC-MAN-0083 to inspect the DPF for coolant, oil or fuel contamination before a parked regeneration. Always confirm the engine family and GHG14 emissions level against the vehicle, and cross-check the latest procedure in the Detroit Power Service Literature on the official Detroit website.
Who needs this SPN 4765 FMI 0 manual
Diesel technicians, fleet maintenance teams and workshop owners diagnosing a high exhaust temperature fault, a 25% derate or aftertreatment contamination on Detroit DD Series trucks use this sheet to work the fault in order instead of guessing. The idle-speed-balance and contamination steps make this sheet valuable for tracing high exhaust temperature back to injectors, turbo seals or head faults.
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