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-4020 Fuel Tank Pressure Sensor. Signal Too High. Intermittent Fault (B6294S; 2000-2001) >> Signal too high. Intermittent fault