Home >> Volvo >> 2005 >> S60 T-5, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) - Diagnostic Trouble Codes And Associated Procedures - 8 Of 14 >> ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency. Permanent Fault (B5254T2; 2003-2004) >> Permanent fault