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Home >> Volvo >> 2004 >> XC90 Base, AWD >> Repair and Diagnosis >> Electrical >> Charging Systems >> Electronic Modules - Design And Function >> Engine Control Module (ECM) (B8444S; 2005-2011) >> Diagnostic Functions >> Overview >> Substitute Value

Substitute Value

For certain types of diagnostic trouble codes (DTCs), the missing signal is replaced with a substitute value so that the system can continue functioning.