Code Details
| Display code | SPN 3246 FMI 0 |
|---|---|
| SPN | 3246 |
| FMI | 0 |
| OEM code | None listed |
| Manufacturer | Volvo |
| System | Aftertreatment �?DPF |
| Component | DPF / outlet temperature sensor / regen system |
| Source address | Unknown or not applicable |
| Severity | medium |
| Review status | source backed |
| Source confidence | medium |
| Last reviewed | 2026-06-12 |
Plain-English Meaning
Volvo D13 DPF regeneration raises the filter temperature to 550�?50°C to burn accumulated soot. SPN 3246 FMI 0 means the outlet temperature went above the normal ceiling for this process. On Volvo VNL, VNX, and VHD trucks, this most commonly happens when the DPF is allowed to accumulate a heavy soot load before regeneration, or when a fuel system issue is providing excess hydrocarbons to the aftertreatment. VCADS Pro provides detailed temperature profiles to isolate the cause.
SPN 3246 FMI 0 is DPF Outlet Temperature above normal operating range. On Volvo D13 with the UECU (aftertreatment control unit), VCADS Pro displays DPF inlet and outlet temperatures, regen cycle history, peak temperatures, and fault event snapshots. The aftertreatment temperature differential between DPF inlet and outlet during a regen helps assess whether heat is being properly distributed through the filter or concentrated at the outlet.
Common Symptoms
- Fault set during active DPF regen
- High exhaust temperature indicator on some configurations
- Regen may be aborted or limited by the aftertreatment system
- May appear with DPF soot overload codes
Possible Causes
Possible causes may include the items below. The list is not a parts diagnosis.
- DPF heavily soot-loaded requiring a prolonged intense regen cycle
- Repeated regen inhibition causing soot accumulation beyond normal levels
- Rich combustion condition sending excess fuel to the exhaust
- DPF outlet temperature sensor fault
- Ash accumulation requiring DPF service cleaning
First Checks
- Connect VCADS Pro and review DPF soot load history and regen frequency data
- Monitor DPF inlet and outlet temperatures during a regen cycle for abnormal heat profiles
- Check for companion fuel system codes that may indicate over-fueling or dosing injector issues
- Confirm the DPF outlet temperature sensor reading is plausible by comparing to the inlet sensor
- Check ash load status �?Volvo specifies service intervals for DPF ash cleaning
Can I Keep Driving?
Typically driveable. Repeated over-temperature events will shorten DPF and catalyst service life. Investigate and resolve the root cause.
Related Codes
Related Lookup Pages
Sources
- Volvo Trucks Tech Info Public Resources Volvo Trucks North America · oem · accessed 2026-06-11 · confidence medium
Source: Volvo Trucks North America, Volvo Trucks Tech Info Public Resources. This page paraphrases factual fields only and is not a substitute for the original document.
Open source - Volvo Trucks / Mack Trucks Technical Support Volvo Trucks North America / Mack Trucks Inc. · oem · accessed 2026-06-10 · confidence medium
Source: Volvo Trucks North America / Mack Trucks Inc., Volvo Trucks / Mack Trucks Technical Support. This page paraphrases factual fields only and is not a substitute for the original document.
Open source - SAE J1939 Standards Collection SAE International · official · accessed 2026-05-05 · confidence medium
Source: SAE International, SAE J1939 Standards Collection. This page paraphrases factual fields only and is not a substitute for the original document.
Open source
FAQ
Does the Volvo D13 have a passive regeneration mode as well as active regen?
Yes. At highway speeds and sufficient exhaust temperatures, the D13 DPF regenerates passively without the dosing injector adding fuel. SPN 3246 FMI 0 is more typically associated with active regen cycles, where fuel is added to raise DPF temperature for regeneration. At sustained highway speeds, the DPF rarely needs to reach active regen conditions.
How often does the Volvo D13 DPF need ash cleaning?
Volvo specifies DPF ash cleaning intervals in the engine maintenance schedule, typically based on miles or hours. Ash accumulation depends on engine oil consumption, fuel quality, and operating conditions. VCADS Pro displays the ash load status. Ash cleaning is typically needed every 200,000�?00,000 miles depending on the application, but severe-duty operations may require more frequent service.
Can the Volvo D13 DPF regen while the truck is parked?
Yes. When the DPF soot load reaches the level where a parked regen is requested, the driver initiates the stationary regen process as instructed by the D13 driver display. VCADS Pro can also initiate a forced regen during service. Parked regens require the engine to run at elevated idle with the vehicle stationary in a safe, open area with no flammable material near the exhaust system.