The automobile meaning of the engine P0446 Code is not suitable for solving the car engine and do not allow any other false meaning for solving the car engine. The automobile dictionary meaning of the code is not perfect if you do not know how to use the false meaning. The automobile dictionary meaning of the code is P for OBD-II Diagnostic Powertrain (P) Trouble Code For Engine. 0 for Intake Valve Control Solenoid Circuit Low. 4 for Engine Oil Temperature Sensor Malfunction. 4 for Cylinder 10 Contribution or balance Fault and 6 for Exhaust Gas Recirculation Sensor B Circuit High.