Detailed guide for SPN 5319 FMI 31
Back to top ↑Incomplete regen is the slow-motion version of a breakdown. Let it finish, then fix the reason it can’t finish reliably.
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Share ↓SPN 5319 FMI 31Severity: Warning
SPN 5319 FMI 31: DPF incomplete regeneration – regen did not finish
Quick Answer
DPF incomplete regeneration – regen did not finish
Code
SPN 5319 FMI 31
Severity
Warning
Applies to
Check OEM application
Can I drive?
Driving suitability is not established by this code alone.
Common Symptoms
- Regen ends early
- Restriction increases over time
- Fuel economy drops
Likely Causes
- Shutdown during regen
- Low exhaust temp conditions
- Underlying faults preventing proper regen
Common Fixes
- Allow full regen cycle
- Fix temp/pressure faults first
- Inspect for leaks and restrictions
Full technical sections↓
What does SPN 5319 FMI 31 mean?
Back to top ↑DPF incomplete regeneration – regen did not finish
Images for SPN 5319 FMI 31 (location, common failures)
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Incomplete regen leaves soot behind and increases restriction over time.
Credit: Wikimedia Commons • License: CC BY-SA 3.0
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