This automobile dictionary meaning of this engine P1409 Code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 1 for MFG – Manufacturer Specific. 4 for Transmission. 0 for IC Circuit High Voltage and 9 for Kick-Down Switch Failed Short. Here, it seems that the powertrain is faulty and it is necessary to fix the car engine properly. The innovative multi-displacement system turned off conflicting pairs of cylinders, permitting the engine to have three different shapes and displacements. The engine P1409 code had an sumptuous diagnostics process, including presentation engine trouble codes on the air conditioning display.