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Home >> Volvo >> 2004 >> XC90 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Electronic Modules - Design And Function >> Differential Electronic Module (DEM) (4T65 AWD; 2005-2006) >> Diagnostic Functions >> Diagnostic Trouble Codes (DTCS)
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Diagnostic Trouble Codes (DTCS)

A diagnostic trouble code (DTC) is stored if the control module detects a fault. Should a fault disappear for any reason after being permanently stored in the control module as a diagnostic trouble code (DTC), the information remains stored in the control module.

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