Home >> Volvo >> 2004 >> S80 Base, 2.5 59, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 4 Of 11 >> ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing. Permanent Fault (B6294S; 2000-2001) >> Signal missing. Permanent fault