The automobile meaning of the P284A Code is not helpful and it is important thing, The powertrain problem of the car engine is the main problem and the automobile dictionary meaning of the code lets you know basic information. The automobile dictionary meaning of the code is P for OBD-II Diagnostic Powertrain (P) Trouble Code For Engine. 2 for Fuel And Air Metering (Injector Circuit Malfunctions Only). 8 for Engine Oil Temperature Sensor Malfunction. 4 for Cylinder 10 Contribution or balance Fault and A for Exhaust Gas Recirculation Sensor B Circuit High. You need to find the real meaning of the code what is related with the car and provided by the car manufacturer.