2008 FORD ESCAPE User Comment / Complaint

Why driving the tire pressure indicator light will come on in the dash and the computer will state ?tire pressure sensor fault.? i have had it into the dealer four times and they have replaced the sensors and still having the same issue. the dealership has told me it has to do with a cell phone charger plugged into the cigarette lighter and setting off the tire pressure indicator on the dash, as well as sending a false signal to the computer. they state there is a ford bulletin out on it but i can find anything on it.