The general meaning of the P2BA9 Code is common thing and the common meaning of the code is available online. The genuin meaning of the P2BA9 code is easy to get if the engineer gets the brand name and model number of the car. The dictionary meaning of the of the engine code for this P2BA9 Code is P for Powertrain Code – Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. B for Transmission. A for BBV Sensor Circuit Low Voltage and 9 for A/C System High Pressure High Temperature. There are general information about the code.