What is the purpose of scanning for diagnostic trouble codes after warning lights are observed post-repair?

• A. To identify and address faults
• B. To reset service reminders
• C. To adjust wheel alignment
• D. To calibrate the steering angle sensor

Answer: (A)

Reading diagnostic trouble codes after warning lights show up helps you identify exactly which system or component is reporting a fault. The codes are created by the vehicle’s computer and point you to where to look, guiding the repair so you can address the real issue instead of guessing. It also serves as a check that the repair resolved the problem and that no new faults are present. Resetting service reminders, wheel alignment, or steering angle sensor calibration aren’t the primary purpose of the scan—these may be needed in related or follow-up steps, but the main goal is to identify and address faults.