The automobile engine P0450 Code is found in the car engine and automobile dictionary meaning of the code is available online. The automobile dictionary meaning of the code is not perfect for solving the car engine problem and it 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. 5 for Cylinder 10 Contribution/balance Fault and 0 for Exhaust Gas Recirculation Sensor B Circuit High. You should allow the correct meaning of the code for solving the car engine. Do not trust on any other meanings of the car engine.