Common Car Diagnostic Terms Explained

What is the definition of a "Diagnostic Trouble Code (DTC)"?

A. A code that indicates a fault in the vehicle's system

B. A code that shows the vehicle is running smoothly

C. A code that represents a recommended maintenance action for the vehicle

Answer:

A. A code that indicates a fault in the vehicle's system

Diagnostic Trouble Code (DTC) is a code that indicates a fault or issue in the vehicle's system. When a problem is detected in the vehicle, the onboard computer generates a DTC to help technicians identify and fix the issue.