By the engine P1743 Code, it is possible to know about the car engine problem and the meaning of the code can be from the car manufacturer and online. You will find the automobile dictionary meaning of the code from online easily. For the car engine P1743 Code, the meaning of the car engine is p for Powertrain Code Problem is related engine, transmission and emissions systems. 1 for MFG – Manufacturer Specific. 7 for Auxiliary Emission Controls. 4 for BBV Sensor Circuit Low Voltage. 3 for Transmission Control Module Reprogrammable Memory. Solve the car engine by the real meaning if possible.