The engine P0028 Code is fully descriptive and it is necessary to get the meaning of the code. The manufacturer of every car has a specific meaning what is necessary to use for solving the car engine problem. The manufacturer setup meaning of the code is not available online but for understand the code or the problem, you can use the automobile meaning from online. The manufacturer meaning of the code is found from the manual of the car. The meaning is related with the manufacturer and mode of the car. Do not use the common meaning of the code for solving the engine problem.