The real meaning of the C1426 Code is not necessary thing and the real meaning of the code is related with the car manufacturer and it is related with the model of the car. Do not try to solve the car engine problem with the general meaning of the code. Do not follow the meaning from the different manufacturer. You need to know the meaning related with the car brand and model. Do not follow common meaning for solving the car engine. Some expensive machines and tools are necessary with expertise for solving the car engine problem and do not drive the car if the problem is not solved.