The engine P1305 Code helps for solving the car engine properly. Do not use wrong meaning of the code what you can collect from the wrong car manufacturer. Due to the wrong meaning of the code, you will get new problem in the car engine. 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. 3 for IC Module 4X Ref Circuit Intermittent, No Pulses. 0 for IC Circuit High Voltage and 5 for Park or Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit.