The P2305 engine code seems a kind of powertrain problem and this problem is very easy to fix. You do not need to invest a good amount of money for solving the car engine. The automobile dictionary meaning of the code is not important but you can use it when it is necessary. 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. 3 for IC Module 4X Ref Circuit Intermittent, No Pulses. 0 for IC Circuit High Voltage and 5 for Park/Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit.