Diagnostic Trouble Codes (DTCS)

A diagnostic trouble code (DTC) is stored if the control module detects a fault.

If for some reason a fault disappears after the diagnostic trouble code (DTC) has been permanently stored in the control module, information about the fault is stored in the control module.

In certain cases the faulty signal is replaced with a substitute value or certain functions are limited. Any diagnostic trouble codes (DTCs) and information stored in the control module memory can be read out using VIDA (Volvo scan tool).