The meaning of the P20A9 Code is available online but it is not required to maintain that dictionary meaning. You will not get sufficient information from the dictionary meaning for explaining the car engine problem. You have to get the car brand information. All car manufacture set the meaning of the code. You will get this code in dissimilar car engines but meanings are also different for each car engine. 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 Fuel And Air Metering. A for BBV Sensor Circuit Low Voltage and 9 for Kick-Down Switch Failed Short.