The automobile dictionary meaning of this car engine P3443 Code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 3 for SAE – Generic. 4 for Transmission. 4 for BBV Sensor Circuit Low Voltage 3 for Transmission Control Module Reprogrammable Memory. You must fix the car engine if you want to drive. When you know the real meaning of the code, you should not use automobile dictionary meaning for solving the car engine. However, you cannot fix the car engine in your place or test the car engine. You must ask for help from an automobile engineer.