Learn what SPN 3363 FMI 5 means, its causes, and how to fix it. Follow our simple guide to resolve the issue and get your equipment running smoothly again.
SPN 3363 FMI 5 indicates a fault with the Aftertreatment 1 Diesel Exhaust Fluid (DEF) Dosing Valve Circuit – Electrical Current Below Normal or Open. This means the engine control module (ECM) has detected that the current in the DEF dosing valve circuit is lower than expected or the circuit is open, potentially affecting DEF injection and emissions control.
Common causes include:
To resolve this fault:
Prevent this fault by: