The engine P20DB Code is a short description for the car engineer for solving the engine. Do not get the wrong meaning for solving the car engine. The engine code is available as dictionary and manufacturer meaning but for solving the car, you have to depend on only the manufacturer meaning. The dictionary meaning of the code is general information and you do not need to use that. The engine seems a kind of powertrain problem. Read the manual of the car or get the name of the manufacturer or model for solving the car engine. Do not use false information what may make more trouble.