Home >> Volvo >> 2004 >> V40 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 2 Of 3 >> ECM-4D: Misfiring Damaging To The Three-Way Catalytic Converter (TWC). Faulty Signal. Intermittent Fault (B4204T3 (Ca) (Us); 2001-2003) >> Faulty signal. Intermittent fault