The meaning of the car engine P0726 Code lets you know about the car engine problem and real meaning of the code helps most to fix the car engine but you will get different meanings of the engine code what may not suitable for the 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 6 for Cruise Control System – Vehicle Accel Too High. Fix the car engine with the right meaning of the code.