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

fuel codes

SPN 157 / FMI 0

Injection Rail Pressure — Above Normal (Most Severe)

SPN 157 / FMI 1

Injection Rail Pressure — Below Normal (Most Severe)

Fuel Delivery Pressure — Below Normal (Most Severe)

Fuel Rail/System Pressure Too Low

Fuel Rail/System Pressure Too High

Fuel Injector Driver Circuit (Bank 1)

Fuel Rail Pressure Low