I have a problem with CEL comes one once awhile but goes away when switch off and switch back on. However recently the engines starts to dies off suddenly during idling or during driving. I decided to perform check code process. I pull out the socket and place a wire between the socket pin and switch on 2 steps. The CEL light stays on and does not blink. What is the problem? Could it be MAF or Air Flow Sensor is faulty?