When I was a kid this happened to my Mom's Ford Granada. She would boil a pot of water, go out and put it on the lock. Even then I knew that this wasn't the correct way to do it since the water is going to cool down and freeze. It happened to me once one morning on a 1980 Mustang I had. I put -30c windshield wiper fluid on the lock and about 5min later I was able to unlock it.

 

Well...I spent twelve years in Minnesota, and generally avoided washing my vehicles in any temp below freezing. In fact, once the temp got much below 20-25, most (if not all) car washes would close. Water is a fairly unpredictable medium, it tends to get into a lot of places and freeze very quickly, possibly causing all sorts of issues, regardless of vehicle brand or type.

This is not to say your vehicle doesn't have a problem, it very well might, my point is only that perhaps exacerbating it by washing in below-freezing temperatures may not be the best course of action unless you can immediately get the vehicle in some warm structure where you can dry it very thoroughly. I get your concern about getting the salt off it, but still...

 

Not sure if you're joking or just being a dick!

My previous F150 that I owned for 6+ years also had the parking sensors in the bumper.
In my world -40 in winter is not uncommon and our winters up here last a while!!

That said the sensors on my 2013 F150 NEVER once...not ever...malfunctioned due to ice and/or snow.

My 2018...the sensors go off regularly either after washing, or just from the cold temperatures.

But ya you're right..this isn't a ford issue, this is my own fault! (fckn eyeroll!!!)