When the car engine does not work well or you are facing annoying sound from the car engine, you should test the car engine. The engine P2049 Code has found from the car engine and the car engine code carries important meanings of the code what is used for solving the car engine problem. The automobile dictionary meaning of the code is also important meaning and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 0 for Fuel And Air Metering and 4 for BBV Sensor Circuit Low Voltage.