Home >> Volvo >> 2007 >> S60 Base, AWD >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Anti-Lock Brake System (Abs) & Brake Control Module (BCM) Diagnostic Trouble Codes - 1 Of 2 >> Abs-0020: Right Front Wheel Sensor. Signal Missing. Permanent Fault (2001) >> Signal missing. Permanent fault