The engine P0077 Code is related with the car and it is necessary to discover the real meaning of the code for solving the car engine problem. If the correct meaning is not followed, you cannot solve the car engine. The general meaning of the engine code is not necessary to follow. You may know the automobile meaning and it is P for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 0 for Fuel And Air Metering. 7 for Vehicle Speed Output Circuit and 7 for Cruise Inhibit Control Circuit. The code is for the powertrain problem.