Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control Module (ECM) Diagnostic Trouble Codes - 7 Of 11 >> ECM-4308: Leak Diagnostic. Large Leak (B6284T; B6294S; 2000-2001) >> Leak diagnostic