The P20A0 Code has explanation and without getting the right meaning of the code, it is impossible to solve the problem from the car engine. This code has general meaning and manufacturer meaning. The right meaning of the code is manufacturer’s meaning. The dictionary meaning of the P20a0 engine code what likes a kind of powertrain problem. The general 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 0 for Transmission Engaged At High Throttle Angle.