You want to fix the car engine’s problem, you need to know well about the engine and problem. For solving the car engine problem, you should check the car engine and know the real meaning of the engine code. This engine P0724 Code has come on the engine code reader screen for the test of the car engine and the general 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 4 for Cruise Vehicle Speed/Set Speed Difference Too High.