Had a sensor fixed at freightliner last yr. been on 3 trips no prob. Motorhome been sitting since April. Pulled it out of the barn and backed up down my drive about 800 ft down a small slope to an o...
If you have an ohmmeter it is easy to check and replace the ABS sensors. Most have a connector about two feet from the sensor itself. It should read about 1200 ohms between the two contacts once it is unplugged. If you find a bad one, they are fairly easy to replace. You can also try making sure that they are all pushed in completely and then drive it and see if they reset themselves.