The meaning of the P20A6 Code is related with the car engine and it is associated with the brand of the car engine. Do not fix the car engine according to the dictionary meaning. The dictionary meaning of the code is general information and it does not help for solving the car engine. The general/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 6 for Transmission Control Module Reprogrammable Memory. Until, you get the fixed car, do not drive the car.