If you want to fix the car engine, you need to know the meaning of the engine P0722 Code and make sure that real meaning of the code, you have found. You can use the automobile dictionary meaning of the code when you do not have the real meaning. 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. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 2 for A/C System High Pressure High Temperature. Use the real meaning of the code for fixing the car engine.