The automobile dictionary meaning of the engine P0979 Code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 9 for Fuel And Air Metering (Injector Circuit Malfunctions Only). 7 for Vehicle Speed Output Circuit and 9 for Kick-Down Switch Failed Short. It means that location of the problem of the car engine is powertrain problem and this problem can be fixed easily. Do not allow false meaning for solving the car engine. You may get terrible problem in the car engine and the problem may make accident in your life. When the car engine is ok, a test drive is recommended.