Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control Module (ECM) Diagnostic Trouble Codes - 6 Of 11 >> ECM-3330 Ignition Coil Cylinder 4, Signal. Signal Too High. Intermittent Fault (B6294S2; B6294T; 2002-2004) >> Signal too high. Intermittent fault