The engine P0771 Code is found in the car engine and meaning of the code is necessary to fix the car engine. You can easily find the automobile dictionary meaning of the code but you always seek for the real meaning of the code. The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 7 for Auxiliary Emission Controls. 7 for Vehicle Speed Output Circuit and 1 for TFP Valve Position Switch-Drive Without Drive Ratio. If you are not an expert automobile engineer, you must use this meaning at the first time.