There is quite a bit of error code information in the service manual for my R220, but I have not had to use any of it yet. I do not know if Gehl supports any engine diagnostic software, my guess is that you will have to contact Yanmar. It gets frustrating with any of these equipment software related problems-I spent 25 years diagnosing industrial equipment using Mitubishi and Rockwell software to access PLC's, and none of the ag equipment, industrial equipment, or automotive companies seem to think anyone but their own people are competent to troubleshoot.
