The engine P1225 Code helps to fix the car engine properly but you should seek for the real meaning of the code. The real meaning of the code is found from the car engine manual and meaning of the code is provided by the car manufacturer. The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 1 for MFG – Manufacturer Specific. 2 for Accelerator Pedal Position (APP) Sensor 1 Performance. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 5 for Park/Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit.