Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Body & Frame >> Seats >> Power Seat Module (PSM) Diagnostic Trouble Codes >> PSM-0033: Backrest, Motor 2 (M2-). Signal Missing. Intermittent Fault (1999-2006) >> Signal missing. Intermittent fault