I have a 2014 King Ranch Expedition. I bought it used with 65000 miles in 2017. A few months after buying it, I began to experience the following randomly, lasting anywhere from a few seconds to almost an hour. So far the dealerships can't identify the problem. The alarm will sound and I will get error messages alternately displayed: "Tire pressure monitor fault; Trailer brake module fault; Door ajar"; Brake light stays on; Tire pressure light blinks and then stays on; When these errors occur, my runners will not deploy, the air will blow but will stop blowing cold, and my backup camera will not work, or once my backup camera was displaying while I was driving forward. Does anyone have any ideas? This is very frustrating.