The meaning of the P20A1 Code is available as general and manufacturer meanings. You should collect the manufacturer information about the car engine. The dictionary meaning of the code is available online but you should not use that dictionary meaning for solving the car engine problem. However, the car manufacturer sets specific meaning for the code. That is why, it is necessary to get the real meaning of the code. The common meaning of the code is not highly necessary thing for solving the car engine. You can search the common meaning of the code online using Google search engine.