Detroit fault code SPN 3216 FMI 10 is the TruckFaultCodes.com diagnostic sheet for the High NOx at Idle condition on Detroit DD-series engines. This 2 pages reference lists the fault identification, monitored conditions where shown, and the step-by-step troubleshooting the technician follows in the shop.
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | Detroit DD Series (EPA 2007-Current) |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Publication no. | Not printed; TruckFaultCodes.com reference |
| Year / Revision | 2017 |
| Pages | 2 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (SPN 3216 / FMI 10)
- Description and enabling conditions
- EGR and charge-air inspection
- Idle Speed Balance and ATS checks
- High-idle regeneration and log submission
SPN 3216 FMI 10 troubleshooting steps
The sheet monitors NOx. Enabling conditions are zero vehicle speed, engine speed below 900 rpm, EGR closed. Typical duration is 2 seconds, the dash lamps are MIL, and the engine reaction is none.
The six-step routine first repairs any Exhaust Gas Recirculation (EGR) faults, then visually inspects the air inlet, Charge Air Cooler (CAC) and EGR piping for leaks or damage. An Idle Speed Balance (ISB) test checks for a faulty fuel injector, and the Aftertreatment System (ATS) is inspected for exhaust leaks. With the diesel diagnostic tool connected, a high-idle regeneration is performed and the log file is submitted to the Detroit Customer Support Center at 800-445-1980.
Applicable truck models
This sheet applies to Detroit DD-series diesel engines (the DD13, DD15 and DD16 family) built under the EPA 2007-Current emissions platform, in its GHG14 calibration. Engine and emissions specifications should always be confirmed against the vehicle build; full engine information is published on the Detroit Diesel official site.
Who needs this SPN 3216 FMI 10 manual
Diesel technicians chasing an emissions complaint with high tailpipe NOx at idle use this sheet to work the EGR, charge-air, injector and aftertreatment path in order. It is a quick bench reference rather than a full workshop manual, so the named removal steps still route back to Power Service Literature and, where escalation is needed, to the Detroit Customer Support Center.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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