The automobile dictionary meaning of the car engine P2649 Code is found online and do not prefer this meaning of the code for solving the car engine. If you do not find the real meaning of the code, then you can use the general meaning of the code for solving the car engine. The general meaning of the car engine code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 6 for Vehicle Speed Control And Idle Control System. 4 for BBV Sensor Circuit Low Voltage and 9 for Kick-Down Switch Failed Short.