The engine P0720 Code is important thing and this code lets you know detail of the car engine’s problem if you find the right meaning of the code. Do not use any meaning of the code what are not related with your car or car engine. 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 0 for Transmission Engaged At High Throttle Angle. You must not use this meaning as primary basis.