The engine P0673 Code’s automobile dictionary meaning is found online and it is not very important thing and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 6 for Vehicle Speed Control And Idle Control System. 7 for Vehicle Speed Output Circuit and 3 for Transmission Control Module Reprogrammable Memory. When you know the meaning of the code from the manufacturer of the car, then you must not use any false meaning or automobile dictionary meaning. The engine should be fixed properly with the right meaning of the code and you should be careful if you want to fix the car engine.