The B1427 Code has a specific meaning and the meaning of code has various meaning according to the model and manufactures. That is why, before starting the problem, it is compulsory to understand the problem. It seems that problem is related with the body of the engine. It is not necessary to change any part of the engine. For solving the problem, you need the engine to professional. The oxygen sensors on your car method the oxygen in the finish to switch how rich or thin the ratio of fuel and air are in the cylinders. Improving this mixture means better fuel consumption and less finish releases.