Diesel fault codes

Look up OBD-II and SAE J1939 diesel fault codes — what each one means, likely causes, and how urgent it is.

All scr · 15 dpf · 14 sensor · 11 fuel · 7 egr · 5 turbo · 5 emissions · 2 glow · 1

egr codes

SPN 411 / FMI 3

EGR Differential Pressure — Voltage High

SPN 412 / FMI 0

EGR Temperature — Above Normal (Most Severe)

EGR Flow Insufficient Detected

EGR Flow Excessive Detected

EGR Control Circuit