Bobcat 753 P0121 Error Code
P0121 Error Code
Engine Speed Control Signal Fault is the main cause of P0121 error.A significant number of consequences can be suffered due to an overheating engine with code P0121. 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.