The engine P0451 Code is important thing and the automobile dictionary meaning of the code is not correct thing for solving the car engine. The automobile dictionary meaning of the engine 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. 5 for Cylinder 10 Contribution/balance Fault and 1 for Exhaust Gas Recirculation Sensor B Circuit High. The powertrain problem of the engine is easy to fix without changing any parts. For this purpose, you do not need to spend huge money for buying parts.