The automobile meaning of the engine P0073 Code is not helpful and you need to know the real meaning of the code for solving the car engine problem. Do not use this general meaning of the code and it is P for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 0 for Fuel And Air Metering. 7 for Vehicle Speed Output Circuit and 3 for Transmission Control Module Reprogrammable Memory. The automobile meaning of the engine P0073 Code is an area code and powertrain of the engine has the problem and it I easy to fix.