The engine P0523 Code lets you know about the car engine problem and you should not follow any meaning of the code. The engine code is important thing but if right meaning of the code is not followed, the problem of the car engine may not solved. Do not use the automobile dictionary meaning of the engine code and it is P for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 5 for Computer And Auxiliary Outputs. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 3 for Transmission Control Module Reprogrammable Memory.