I have a 2011 Pathfinder Cranks but no start issue, about two weeks ago went out on a Saturday night came home shut off vehicle, next day went to go out put the key in and nothing no lights and no instrument display no click nothing ,checked the battery 12.5 volts checked connection on battery and found loose positive side tightened the connection lights and instrument cluster comes go to start it just cranks won't fire up, so checked fuses and relays all are good, tried to run obd2 scanner to see if possible code, link error, thought it might be my cheap code reader tried two different ones and same thing link error, is this an ecu problem with vehicle or something else that i am overlooking