Hey!!!!
The problem may be caused by a modification of the truck / trailer to which a certain code is not detected, or is simply incompatible by the place, remember that you cannot have vehicle accessories in the truck, you cannot have truck accessories in the trailer, and there are certain mod limits for both.
You can fix it by decreasing the accessories on, or simply modify the trailer, because the reading may be wrong.
If the problems persist, you can use this area to be able to provide some type of proof of what is happening, in order to help you better