The engine P0492 Code contains some information what your car engineer know. If you study the car engine manual, you will know the car engine meaning well. All car manufacturers give right meaning of the code for solving the car engine and by the meaning of the code, location of the engine problem is found. 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 2 for Reverse Input Circuit.