The U1181 Code is related with the car engine problem and it is important thing to know the exact meaning of the engine code. The automobile engineer must find the real cause of the car engine problem and the real meaning of the code helps the engineer. Do not drive the car with the engine problem. Take necessary steps for solving the car engine and find the real meaning of the code for solving the car engine problem. Do not accept any meaning of the code what is available. The general meaning of the code may make more trouble in the car engine.