What does the Clear DTC Codes option allow users to do?

The Clear DTC Codes option is specifically designed to reset diagnostic trouble codes, or DTCs, which are stored in a vehicle's onboard diagnostic system. When a vehicle has an issue that triggers the check engine light or other warning indicators, the DTCs are recorded to help identify the problem. By selecting the clear option, users can erase these codes from the memory, which can be useful if the issue has been resolved or if the codes are no longer relevant.

Resetting DTCs does not diagnose hardware issues or run emissions tests; it simply removes the stored codes. While it may seem like an attractive option to update software settings, the clear function does not alter the vehicle's software; it solely focuses on the diagnostic codes. Therefore, this option is an integral part of the diagnostics and emissions inspection process, allowing inspectors to ensure that any error codes are up to date and reflective of the current condition of the vehicle.