The meaning of the P27A0 Code is important thing for solving the car engine and it is necessary to use the correct meaning. Every car manufacturer provides a specific meaning of the code. If you do not know the exact meaning of the code, it is not possible to solve the car engine problem. Do not use the dictionary meaning of the code solving the car engine and the dictionary meaning of the code is P for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 7 for Auxiliary Emission Controls. A for BBV Sensor Circuit Low Voltage and 0 for Transmission Engaged At High Throttle Angle.