Home >> Volvo >> 2012 >> C70 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 4 Of 8 >> ECM-3503: Misfire, Catalytic Converter Damage. Misfire, At Least One Cylinder (B5244S4; 2006-2007) >> Misfire, At Least One Cylinder