The engine U1171 Code is full description what helps to solve the car engine problem. The car engine problem is easy to solve and it may not necessary to fix the car engine without changing any part of the car engine. Do not try to solve the car part without following right meaning of the code. The engine code has automobile dictionary meaning. You must not use the automobile meaning of the code for solving the car engine. Due to use of the wrong meaning of the engine code, you may face terrible problem in the car engine. If you do not know how to fix the car engine, you must take help from professional.