The automobile dictionary meaning of the P0148 Code is not necessary to know but it is easy to find from online. The automobile dictionary meaning of the P0148 Code is P for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 1 for Transmission. 4 for BBV Sensor Circuit Low Voltage and 8 for PCM Stack Overrun. These meanings are not wonderful for solving the car engine. You need to retrieve the real meaning of the engine code and it is found from the car manufacturer. The car manufacturer set a real meaning of the code what is linked with the car model.