Bobcat T450 D9303 Error Code
D9303 Error Code
Trailer Brake Supplementary Line Output Error Off is the main cause of D9303 error.D9303 code needs proper lubrication of your transmission's moving parts, it's important to always drive with the right amount of clean fluid. It's good practice to periodically scan over the ground where your truck has been parked and check for signs of fluid leaks.
Tip For T450 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.