Reply To: GT650R Fuel Pump Fault
Seems like you have a much older type lambda sensor but as it is OEM Hyosung sensor , on an OEM harness (no modifications), i can’t see a fault there because the connector fits one-way. It may be a sensor that was robbed from a GV650 that likely used alternated wire colours but the pins are the same way.
I can’t tell which brand the lambda sensor says on it, so it might have burned off.
As long as it works , i can’t worry too much on that aspect. You will pull it out and clean it , then refit with copper grease on threads if in doubt!