Had a similar issue yest on my 225 Magnum. Suddenly derated and could only slwly get from back of field to my shop. Can't remember the exact code but think might have been 3141 or 3242? Called service guy and he said it was a fuel problem code. Said start with easy stuff and change fuel filters. Did that and terrible time getting fuel back to filters. Blew air back into line several times and still had to pressurize fuel tank to get fuel to come ut of line to fill filters and bleed system. Had to crank a little to start it but now seem to ave more RPM and power so not exactly sure if was filters or a blockage in tank. It's a CVT and now pulls at a Higher RPM and get up to ser speed better.