There are some common problems what is related with the car engine P0469 Code and those problems are EVAP purge solenoid failure, powertrain Control Module (PCM) failure and wiring issue. The definition of the engine code is EVAP Purge Flow Sensor Circuit Intermittent. You should study well to know all information of the car engine. The automobile dictionary meaning of the code will not be used here for solving the car engine. When you check the car engine, you must check engine light what gives you sufficient information about the car engine problem and solution. A test drive is recommended for solving the car engine.