The trouble P0126 Code is meaningful and if the meaning of the code is not known properly, do not try to solve the car engine problem if you are not experienced or you have not adequate information. Some expensive machines are necessary to use for fixing the car engine. If you have all things and you are ready (with expertise) to solve the car engine problem. The general meaning must not guide you well for solving the car engine problem. Do not drive the car if the car engine is solved. You have to know the general meaning for getting general information only.