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Home >> Volvo >> 2008 >> XC70 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical Modules And Components - Design And Function - 5 Of 5 >> Subwoofer Module (Sub) >> Diagnostic Functions >> Diagnostic Trouble Codes (DTCS)
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Diagnostic Trouble Codes (DTCS)

If the control module detects a fault, a diagnostic trouble code is stored. A fault that was detected during the last driving cycle is defined as permanent. Other faults that are detected are defined as intermittent.