This engine P1539 Code lets you know about the car engine problem. The automobile dictionary meaning of the code lets you know some information about the car engine problem but you must look for the right meaning of the code. 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. 5 for Computer And Auxiliary Outputs. 3 for Cruise Control Servo Indicates Low and 9 for Kick-Down Switch Failed Short. Now do not try to solve the car engine by this meaning if you do not know how to fix the car engine.