The automobile dictionary meaning of the engine P0490 Code is found online and you may learn some information. Do not use this simple meaning for solving the car engine. Due to the false or wrong meaning of the code, you may get new problems in the car engine what may be difficult to solve. 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. 9 for Cylinder 10 Contribution/balance Fault and 0 for Reverse Input Circuit. This description of the code may not suitable for the problem of the car engine.