Just FYI low or weak batteries can cause all kinds of issues especially with as many modules as these trucks can have and the modules being hyper sensitive to certain voltages. Also if you have an AGM battery they are also notorious for crapping out early. Ive seen it enough at my dealership. Replace battery and see if that doesnt help
We've had to replace those AGM batteries in cars with less than 200 miles before. If your Ranger sat on the lot for any amount of time before you bought it, its hell on those batteries if they dont start/maintain the cahrge on them. But either way I hope you get your issue fixed.
