The car engine P2315 Code’s meaning is available from the car manufacturer what is related with your car brand. You also get the automobile dictionary meaning and meaning from different automobile manufacturer from different car brand. The car engine should be ok for driving the car safely. Solve the car engine problem faster if you want to drive the car. 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. 1 for Low Coolant Circuit and 5 for Park/Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit.