The engine P1309 Code is important thing and you need to know the meaning of the code for solving the car engine. The problem is in powertrain and this problem can be fixed easily. You do not need to replace any component for solving the car engine problem. The automobile dictionary meaning can be followed and it 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 9 for Kick-Down Switch Failed Short. When the car engine is ok, a test drive is recommended.