The engine P2A00 Code is important for the automobile engineer to solve the problem and that is why, manufacturer meaning is necessary to know. The alphabet P comes for the powertrain problem of the car of the engine. The manufacturer sets the code and meaning of the code also changes the manufacturer. The dictionary meaning of the code is P for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. A for Computer and Auxiliary Outputs. 0 for IC Circuit High Voltage and 0 for Transmission Control Module Reprogrammable Memory. Do not drive the car until the problem is fixed.