Home >> Volvo >> 2000 >> S80 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 8 Of 11 >> ECM-640D: Turbocharger (TC) Control System. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006) >> Signal too high / Signal too low