Do not drive the car when any problem is found in the car engine. The car engine P3445 Code’s meaning is necessary to know for solving the car engine problem. The general meaning of the code is p is Powertrain Code Problem is related engine, transmission and emissions systems. 3 for SAE – Generic. 4 for Transmission. 4 for BBV Sensor Circuit Low Voltage. 5 for Park/Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit. Do not fix the car engine with this general meaning of the code when you know the real meaning and if you have no experience, you must depend on automobile technician for solving the car engine problem.