The engine P0063 Code lets know the problem about and an automobile engineer needs to follow correct meaning of the code for solving the car engine problem. If automobile engineer uses the automobile meaning of the code, it will make more trouble. The general/automobile meaning of the code is P for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 0 for Fuel And Air Metering. 6 for Control Module Throttle Actuator Position Performance and 3 for Transmission Control Module Reprogrammable Memory. Do not use this meaning and if you use this meaning, you will face more trouble in the car engine.