You need to study about the car engine problem according to the real meaning of the engine P0718 Code. You can learn the automobile dictionary meaning of the code for learning general information. 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. 1 for Low Coolant Circuit and 8 for PCM Stack Overrun. Do not use this meaning of the code if you have the right meaning of the code what you will find from the automobile engine manual by the name of the car and car manufacture.