The U1135 Code is used for helping and solving the car engine problem. Do not use any meaning of the code for fixing the car. If you look online, you will get many types of meanings of the same code. You must look for the right meaning what is connected with the car brand or manufacturer. Wrong meaning of the engine code may make new trouble in the car engine. You should be careful for solving the car engine problem. Do not try to solve the car engine problem by yourself as you do not have idea how to fix the car.