You need to know the correct meaning of the car engine code and the engine code’s right meaning is very important. The meaning of the code is available from different sources. The meaning of the car engine P2149 Code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 1 for Transmission. 4 for BBV Sensor Circuit Low Voltage and 9 for Kick-Down Switch Failed Short. This general meaning of the code may not suitable with the real meaning of the car engine code. Do not allow any meaning of the car engine code.