Possible cause

Connector terminal disconnection, poor contact, damage, deformation, corrosion
Forward sensing camera (FSC) power supply voltage or body ground malfunction
Open circuit in wiring harness between connector C-42 and connector C-27
Open circuit in wiring harness between forward sensing camera (FSC) and connector C-27
Connector C-42 malfunction
Connector C-27 malfunction
Forward sensing camera (FSC) malfunction