Diesel fault codes
Look up OBD-II and SAE J1939 diesel fault codes — what each one means, likely causes, and how urgent it is.
dpf codes
SPN 3246 / FMI 0
DPF Outlet Gas Temperature — Above Normal (Most Severe)
dpfHigh
SPN 3251 / FMI 0
DPF Differential Pressure — Above Normal (Most Severe)
dpfHigh
SPN 3251 / FMI 2
DPF Differential Pressure — Data Erratic
dpfMedium
SPN 3719 / FMI 0
DPF Soot Load — Very High (Most Severe)
dpfCritical
SPN 3719 / FMI 15
DPF Soot Load — High (Least Severe)
dpfMedium
SPN 3720 / FMI 16
DPF Ash Load — High (Moderate)
dpfMedium
P2002
Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
dpfHigh
P242F
DPF Restriction — Ash Accumulation
dpfHigh
P244A
DPF Differential Pressure Too Low (Bank 1)
dpfHigh
P244B
DPF Differential Pressure Too High (Bank 1)
dpfHigh
P2453
DPF Pressure Sensor Range/Performance
dpfMedium
P2454
DPF Pressure Sensor Circuit Low
dpfMedium
P2459
DPF Regeneration Frequency
dpfMedium
P2463
DPF Soot Accumulation
dpfHigh