The U1154 Code is found in many car engine and if the meaning of the code is found, it becomes difficult for solving the car engine problem. You can fix the engine if you know how to fix the car engine and if you have all required tools and expensive machines. The car engine is easy to fix if the problem is general. The network problem is not difficult problem and this problem can be fixed at low rate. Do not drive the car until the car engine is solved. You should take the car to automobile repair center for solving the car engine as soon as possible.