You must find the cause of the car engine problem and appearing the car engine P0320 Code. The information of the engine problem is found easily from the meaning of the engine code. The automobile dictionary meaning of the engine code is not very helpful and it is found online free. 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. 3 for Engine Oil Temperature Sensor Malfunction. 2 for Cylinder 10 Contribution/balance Fault and 0 for Reverse Input Circuit. You should rely on the real meaning of the code for fixing the car engine.