I'm not 100% convinced that 1 occurrence of the fault in 6 years at this stage necessitates a new harness. I'm not convinced it will be good willed either as some have had luck with that and others not. not really wanting to find out at the end of a big bill and being without my car unless it's necessary.
I'm not even convinced Mitsubishi knows what components are causing the fault. Replacing the harness screams of a corporate knee jerk bandaid.
Connectors jiggle around ect. The fault isn't current. I will watch how it unfolds in the next while.
If it keeps reoccurring then I will bring it to a dealer and try my luck with them.
I'm hoping my luck is more like rktriton