Connectors around the RFC box and fuse panels are prone to moisture ingress, which causes poor ground connections.
There is a profound loneliness in diagnosing these faults. In the old days, a mechanic could listen to the engine and hear the ailment. Today, the driver plugs in the diagnostic laptop, navigating the Iveco diagnostic software, scrolling through menus to find the specific symptom. The "RFC" designation often relates to the functional failure of a component—a relay that refused to bridge the gap, a sensor that went blind. iveco stralis rfc fault codes
To clear "ghost faults," some technicians recommend a by disconnecting the battery for approximately 15 minutes before re-checking for active codes. IVECO Stralis RFC Fault Codes Guide | PDF - Scribd Connectors around the RFC box and fuse panels