FMI 12 — Bad intelligent device or component
A smart sensor, actuator, or module has reported an internal failure or is not responding correctly.
What it typically points to
Internal failure of the device itself; sometimes a power/ground problem makes a good device look bad.
Codes with FMI 12
- SPN 629 FMI 12Controller #1
- SPN 639 FMI 12J1939 Network #1 (Primary Data Link)
- SPN 641 FMI 12VGT Actuator
- SPN 3216 FMI 12Aftertreatment 1 Intake NOx
- SPN 3226 FMI 12Aftertreatment 1 Outlet NOx