The automobile dictionary meaning of this engine P2615 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. 1 for Low Coolant Circuit. 5 for Park/Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit. The car engine P2615 code had an intricate diagnostics procedure, including showing the car engine trouble codes on the air conditioning display. Do not fix the car engine by any person who has less idea about the car engine and car engine problem. You should be careful in this issue.