Check fwd switch, all other circuits have to be good to have reverse travel. A bad contact or will click but no travel and wont show code. If you lose signal anywhere before a fwd or reverse switch output when the controller senses throttle voltage with no direction input it shows gate. Can be gate switches at times but that would affect both directions.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.