The engine P0493 Code helps to solve the car engine properly. If you do not have the right meaning of the code, you may not know the cause and location of the car engine problem. You should get the meaning what is provided by the automobile manufacturer. 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 3 for Reverse Input Circuit. This code informs some general idea of the car engine problem.