The car engine U1138 Code has different valuable meaning and the write meaning of the code is not used for solving the car. The engineer of the car must seek the right meaning of the code and it is found in the car engine manual. In the car engine manual, you have all necessary information. By the name of the car brand, it becomes easier for solving the car engine problem. Do not fix the car engine with the automobile dictionary meaning. The automobile dictionary meaning of the code is available online and it is not used for fixing the car engine.