The automobile dictionary meaning of the P2BA7 Code is P for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. B for Computer and Auxiliary Outputs. A for BBV Sensor Circuit Low Voltage. 7 for Transmission Control Module Reprogrammable Memory. This general meaning is available online but you need to know the genuine meaning of the code. The genuine meaning of the code is found in the manual of the car engine. According the manufacturer of the car, the meaning of the code changes. Do not drive the car until you get the car engine is fixed.