Volvo S80 2006 anti-skid service required

[PSAcars]

Hello to all. I have a volvo 2006 s80 2.4l petrol 140bhp. I have a message for anti-skid, the fault now is activ at all time. When I start car, a new fault is on " anti-skid temporarily off" and if I rotate the whele few times I get " anti-skid service reguired". I have found info for repair this module, but not enough. Can some one help with more info of repair, is it soft ot hardware problem. Thank you in advance.

[Alawigmx]

If you clear the DTC, try going on the highway and accelerate to about 130kmh, hold steady for 7 sec, and the error reappears, im willing to bet that its a broken ABS ring, can be replaced cheap