The engine P1740 Code is an important thing what lets you know of the car engine problem but if you do not know the right meaning of the code, you cannot easily fix the car engine problem. Moreover, new problem from the car engine will start. The automobile dictionary meaning of the code can be used and it can be fixed easily. The automobile dictionary meaning of the code 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 and 0 for Transmission Engaged At High Throttle Angle.