I recently purchased a 2016 Gehl RT210 and it is throwing a couple engine codes and was wondering what suggestions you may have. The engine codes are 523470-00, 157-03, and 157-16. When I bought it they had replaced the ECU, I recently replaced the fuel filters annd serviced the machine. I am trying to plan next steps. Is any one familiar with these? Skid steer starts up and idles great but derates under load. Thoughts on next steps?