The engine P0605 Code lets us know about the car engine’s problem and follow the right way of solving the car engine if you want to avoid more error from the car engine. New problems of the car engine may be more dangerous and costly. The automobile meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 6 for Vehicle Speed Control And Idle Control System. 0 for IC Circuit High Voltage and 5 for Park or Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit. You should not use wrong meaning of the code at all.