The automobile dictionary meaning of the car engine P2665 Code is found online and you can learn many information from the general meaning of the code. The real meaning of the code is the most important thing and follow the real meaning only but if you do not get the real meaning, you can use general or automobile dictionary meaning of the code. The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 6 for Vehicle Speed Control And Idle Control System. 6 for Control Module Throttle Actuator Position Performance and 5 for Park/Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit.