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Detroit Diesel SPN 3713 FMI 16 indicates that the Diesel Particulate Filter has accumulated soot beyond the moderate high threshold and requires regeneration. This code appears on DD13, DD15, and DD16 engines and is a step above a routine regen request — if regeneration is not completed promptly the engine will enter a derate condition and the DPF may require forced regeneration or service.
Symptoms
- Check engine light on
- DPF or regen warning light illuminated
- Regen inhibited or unable to complete
- Reduced engine performance
- Engine derate possible
- Exhaust back pressure increased
Cause
This code triggers when the ECM calculates soot accumulation in the DPF has exceeded the moderate high threshold. Common causes include:
- Frequent short trips preventing passive regeneration
- Excessive idling preventing exhaust temperatures from reaching regen levels
- Failed or incomplete active regeneration cycles
- Faulty DPF differential pressure sensor giving incorrect readings
- Clogged or damaged DPF requiring cleaning or replacement
- Engine running issues causing excessive soot production
- Regen inhibit switch left in the off position
Can You Keep Driving?
Limited driving is possible but soot load will continue to increase without a successful regeneration. The engine will enter a progressive derate condition if soot reaches critical levels. A parked regeneration should be performed as soon as safely possible.
Recommended Action
Perform a parked regeneration as soon as possible. Ensure the regen inhibit switch is not active. If the parked regen completes successfully and the code clears, monitor for recurrence. If regen fails to complete or the code returns frequently, have the DPF differential pressure sensor, DPF condition, and engine fueling system inspected.
It means the DPF soot load has reached a high level and the engine requires a regeneration cycle to burn off accumulated soot before derate conditions are triggered.
The most common causes are frequent short trips, excessive idling, failed regeneration cycles, or a faulty DPF differential pressure sensor reporting incorrect soot levels.
Short distances are possible but a parked regeneration should be performed as soon as safely possible to prevent the code from escalating to a more severe derate condition.
Yes. If soot load continues to rise without a successful regeneration the ECM will trigger progressive derate conditions to protect the DPF from damage.
Perform a successful parked regeneration. Once the DPF soot level drops below the threshold the code should clear. If it returns frequently have the DPF system and regeneration process inspected for underlying issues.
Related codes
Need Immediate Help With This Fault Code?
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Important Notice
The information provided above is for general informational purposes only and should not replace official OEM service procedures. Always consult the manufacturer’s service manual or a qualified diesel technician before performing repairs. Operating a vehicle with active fault codes may result in further damage.