I was using my tractor to clear part of my 10 acre parcel. It was working fine until I got an warning error code of pth A 523590.03. While it would start and the bucket hydraulics worked fine, I could not get it to move; I pressed both the forward and reverse petals and nothing. I have tried shutting it off and back on over several days and it still gives me the error. When I press the dash indicator, i get the upper code of 081 and the lower code of 070.