2015 VF115 code 28

[mike_hrl]

Hi I'm new to the forum. My Engine started and ran fine for the first ride of the season for about an hour, second outing it died suddenly after 20 minutes and would not restart, had to be towed in. It turns over and almost starts but sounds like it needs gas. Diagnostic software says incorrect shift position switch signal. Also showing throttle valve opening should be 0-90 but with highlighted in red showing value -10.5. I changed fuel filter and water separator, did not give any alarms while running. Any help would be appreciated before taking it to the dealer.