The engine U1001 Code is related with the network. Fixing the car engine is difficult without getting the actual meaning of the code. The engine code has general and actual meaning but you need to collect the actual meaning about the code what is provided by the manufacturer. Manufacturer of the car has set actual meaning of the code but if you do not follow that meaning, you cannot solve the problem from the car engine. The automobile dictionary meaning of the code is not actual information and it does not work for all car engine. So, do not use that information for solving the car.