The P0029 Code is necessary thing for an automobile engine to get the real meaning. The meaning of the code is available as manufacturer meaning and automobile dictionary meaning. Do not use the automobile meaning for solving the car engine problem. The general meaning of the code is P for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 0 for Fuel And Air Metering. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 9 for Kick-Down Switch Failed Short. These meanings of the code are not helpful for solving the car engine problem.