FMI 478 CAT Fault Code

Cause :

The control unit indicates problems in the operation of the throttle. For an unknown reason, the control module was not able to provide training in the limit position of the node.Associated with low engine fluid pressure. The reason most likely is the lack of oil in the engine, so first of all you need to check the amount of consumable. You should also make sure that the engine fluid pressure sensor is working.