Bobcat S740 04-21 Error Code
04-21 Error Code
Engine Oil Pressure Out Of Range High is the main cause of 04-21 error.A significant number of consequences can be suffered due to an overheating engine with code 04-21. The problem might be a blown gasket or something related to the fuel tank.
Tip For S740 Model
It is recommended in cold weather to cycle the glow plugs twice before attempting to start the engine. This will allow for additional heating time for cold weather starting.