The engine U0100 Code is an identity of the code and if you do not get the meaning of the code, you cannot solve the engine problem. The meaning of the code is found as two different ways as like manufacturer and dictionary meaning. The code is related with the Network from the engine. The general meaning of the code is available online. However, theU0100 engine code seems a kind of network problem. Do not use false information for solving the car engine. However, you have nothing to worry if you have taken the car to the automobile engineer for solving the car.