If this only happens in reverse we need to check codes because this could be just a vehicle speed sensor or more serious like a module. Does this happen when going into reverse and you do not move or is it when you start moving?
Let's get the codes in the computer and go from there. If you cannot pull codes, most parts stores can. Just make sure their scan tool can communicate with the ABS module because you may have a code in there due to the stability system.
Sunday, January 19th, 2020 AT 2:24 PM