F5C Engine Controller Main Relay Circuit (Terminal 30) - Stuck Main Relay Error amber
ECM After run was Interrupted
One sign to move on is intensive UTB/Universal engine work, such as needing new pistons and injectors. If you hear loud clunking sounds from the engine, it could be due to the starter hitting the flywheel or a piston piercing the engine block, which can indicate a seized engine. Farmers encountering these problems have coined the saying: If your engine is knockin you better be shoppin.