Home >> Volvo >> 2004 >> S80 Base, 2.5 59, AWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Wheel Module (SWM) & Steering Angle Sensor (SAS) Diagnostic Trouble Codes >> SAS-004B: Steering Wheel Angle Sensor. Faulty Signal (1999-2004) >> Faulty signal