The automobile dictionary meaning of this car engine P3448 Code is an important thing and fix the engine by the right meaning if possible or you need to use the general meaning of the code. The automobile dictionary meaning is also known as general meaning and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 3 for SAE – Generic. 4 is Transmission. 4 for BBV Sensor Circuit Low Voltage and 8 for PCM Stack Overrun. The car engine P3448 code seems a kind of powertrain problem and you must fix this general problem from the car engine.