The P20A2 Code has dictionary and real meaning. For resolving the car engine problem, the real information of the code is essential. The manufacturer of the car engine has set a meaning of the code and that meaning is necessary solving the car engine. The dictionary meaning of the P20A2 Code is not helpful. The general information of this code is available online. The dictionary meaning of the code is p for Powertrain Code – Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 0 for Transmission. A for BBV Sensor Circuit Low Voltage and 2 for Kick-Down Switch Failed Short.