The anti-lock brake system (ABS) warning light and/or other dash warning lights may illuminate due to a failed ABS Control Module. Replacement of the failed module is generally required to correct this concern.Google+
Car Problem Reports
Volvo XC70 ABS Control Module May Fail
Volvo XC70 Problem
Average Mileage: 78,924 mi (65,000 mi - 101,000 mi)
Visitor, 2004 Volvo XC70, 101,000 mi
the warning light stays on. ABS brakes. No cruise control. I am investigating places on the web that rebuild the modular. It doesn't look like it would be too hard to remove & replace. It would be sure be cheaper then the $1,100 a Volvo mechanic quoted me. My only problem is determining if the modular is a K20 or a K25, there was a difference in the quote. after reading some forums, it could be the SAS as well.
Visitor, 2005 Volvo XC70, 90,000 mi
Brake & ABS light is on very often.
Visitor, 2006 Volvo XC70, 65,000 mi
ABS light is on. Dealer suggests replacement at $1600.
Visitor, 2004 Volvo XC70, 75,000 mi
not the sensor; still trying to solve