Nissan has diagnosed my infiniti as having a problem with the ecm sensor. (the car will randomly shut off while you are driving it and now the check engine light comes on). I called up infiniti and they said to tow it to an infiniti dealership and have it diagnosed there. The infiniti dealership is saying there is nothing wrong with it, and the check engine light isnt on anymore. Is this even possible? This a potentially life threatening situation!!!! (if the car is driven)