What does the fault FMI represent?

[SanHope]

The continuous illumination of this indicator light indicates a major fault in the engine's electronic control system. Solution: If this indicator light comes on while the vehicle is in motion, immediately find a safe place to stop and contact the commercial vehicle technical service center (station) for engine inspection and repair. Engine maintenance warning indicator: The continuous illumination of this indicator light indicates a non-major fault in the engine's electronic control system. The engine can still operate, but the electronic control system will adjust the engine's power, speed, and other operating parameters based on the severity of the fault. If this indicator light remains on during vehicle use, promptly contact a 4S shop for inspection and repair.