The dictionary meaning of the P20E9 Code is not important for solving the engine problem. The general meaning of the code is difficult thing for solving the car engine. You need to get the real meaning what is associated with the manufacturer. Do not use any false information for solving the car engine. You need to use experience and machines for solving the car engine problem. If you have not have those things, you are not ready to solve the car engine. However, body of the car engine is problematic and it is easy to solve and it needs less money to fix the problem.