How are diagnostic trouble codes (DTCs) retrieved and interpreted?

• A. Use a scan tool to read stored and pending codes, note freeze-frame data, consult service manuals for code definitions, verify by symptom correlation and clear after repair.
• B. Rely on visual inspection only and ignore the codes.
• C. DTCs can be read only at the dealership with specialized equipment.
• D. DTCs should be cleared before attempting any diagnosis.

Answer: (A)