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Home >> Volvo >> 2003 >> XC70 >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 9 (Alarm System, Control Modules, Engine Management Systems - Design And Function) >> Central Electronic Module (CEM) (2005-2007) >> Diagnostic functions >> Diagnostic trouble codes (DTCs)
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Diagnostic trouble codes (DTCs)

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A diagnostic trouble code (DTC) is stored if the control module detects a fault. The control module can store up to 10 diagnostic trouble codes (DTCs). A fault which is detected in the most recent operating cycle is defined as permanent. Other faults which are detected are defined as intermittent.