Bobcat 753 3509-03 Error Code
3509-03 Error Code
Sensor Supply Voltage Fault is the main cause of 3509-03 error.A significant number of consequences can be suffered due to an overheating engine with code 3509-03. The problem might be a blown gasket or something related to the fuel tank.
Tip For 753 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.