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Home >> Volvo >> 2004 >> S40 Base, 1.9 27 >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Alarm, Central Locking, Turn Signals - Symptom Related Diagnostic Procedures (644 Body) >> Checking Alarm Cause (2000-2004) >> Checking alarm cause >> Diagnostic functions >> Reading and erasing diagnostic trouble codes (DTCs)

Reading and erasing diagnostic trouble codes (DTCs)

Stored diagnostic trouble codes (DTCs) can be read off and erased using this function.

The on-board diagnostic (OBD) system can identify 25 different faults in the form of diagnostic trouble codes (DTCs). Diagnostic trouble codes (DTCs) can only be erased when all diagnostic trouble codes (DTCs) have been read at least once.