DPF soot load high - least severe
The reading is real and slightly high. An early warning, not a shutdown.
SPN 3719 is the parameter the ECM is flagging on Volvo, CAT, Detroit, International, PACCAR, MERCEDES, Mack, Cummins engines. The FMI that comes with it tells you how it failed. Each failure mode below has its own causes and its own test order — do not treat them as the same repair.
The reading is real and slightly high. An early warning, not a shutdown.
The reading is real and slightly high. An early warning, not a shutdown.
The reading is real and slightly high. An early warning, not a shutdown.
The reading is real and slightly high. An early warning, not a shutdown.
The reading is real and slightly high. An early warning, not a shutdown.
The reading is real and slightly high. An early warning, not a shutdown.
The reading is real and slightly high. An early warning, not a shutdown.
The reading is real and slightly high. An early warning, not a shutdown.
Real reading, clearly high. Usually the middle warning stage before a derate.
Real reading, clearly high. Usually the middle warning stage before a derate.
Every SPN and FMI page on this site stays open — no account needed. Pro members can take the code into Truck Commander Pro AI with the VIN, symptoms and photos, keep per-truck history, and print a work order. $9.99 a month.