My ABS light stays on all the time, I just dropped it off a couple hrs ago at a heavy duty truck service center to get it checked , just received a call they could not get a connection I don't know if...
Ours light has been on 4 yrs now. Needed special appointment at truck/brake shop as dealer couldn't work on the chassis. Stated sensor probably just loose. We haven't bothered with it and we are fine with no abs. Up north they are advertised as helping on slippery wet surfaces which we do not drive on. Drove for many many years before ABS was ever invented , and can continue to do so.