This Detroit throttle rate change troubleshooting sheet documents fault code SPN 3464/FMI 16, Intake Throttle Position Abnormal Rate of Change, on Detroit DD Series engines. It commands the intake throttle valve to test positions and confirms the actual position, with no derate applied. Diagnosis uses a diesel diagnostic tool and a resistance check.
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | DD Series diesel engines (DD13, DD15, DD16), EPA 2007 and newer |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Fault code | SPN 3464 / FMI 16 |
| Emission tier | GHG14 |
| Publication no. | Detroit Power Service Literature (via TruckFaultCodes.com, © 2017) |
| Pages | 2 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Detroit throttle rate change table of contents
- Fault code identification: SPN 3464, FMI 16
- Description: MIL lamp, no derate and cold-weather note
- Steps 1-3: tool connection and SPN 51 fault check
- Steps 4-6: command ITV to 20%, 90% and 50% and compare
- Steps 7-10: harness inspection and 10 ohm motor test
- Step 11: reviewing extended data for valve icing
Applicable truck models
This GHG14-tier procedure applies to Detroit DD Series diesel engines and focuses on intake throttle valve position tracking and its motor resistance. As with the derating variant, valve icing in extreme cold can set this code erroneously. See Detroit’s official service literature portal for the authoritative Detroit repair procedures.
Who needs this Detroit throttle rate change manual
Technicians seeing an abnormal throttle response with no derate will use this sheet to command test sweeps and confirm the motor before replacing it. It suits workshops separating a real fault from cold-weather icing.
The full PDF is available in the DiagTechPro manuals library — a free account is required to download. It is offered for reference alongside your Detroit diesel diagnostic tool. DiagTechPro catalogues Detroit fault-code documents so technicians can locate the exact SPN and FMI they are chasing without paging through a full engine service manual. Each entry lists the page count, file size and emission tier up front, and links to the closely related codes shown below so a diagnosis can move quickly from one fault to the next.
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