Get the right meaning of the engine code before solving the car engine problem. The engine code has various meanings and you need to know the accurate meaning for solving the car engine. Find the real meaning of the engine P0748 Code and for that purpose, you have to use the name of the car and manufacturer. The powertrain of the car engine can be fixed with the real meaning only and it is not necessary to change any part from the car engine or powertrain. If the powertrain is ok, you need to drive the car for a test drive.