Different from the general DTCs, the codes starting with N are the nonda Specific Diagnostic Codes and are used for detecting the issues related to battery, tire, or Backup Camera. More information can be found here: https://nonda.zendesk.com/hc/en-us/articles/360043234331.
And usually, there's no clear button when they are detected. But if you are pretty sure that there's no issue with your car, you can modify some data to clear the code.
For example, when you scan the battery-related issue, you could clear it by changing the high or low threshold with the instructions below:
- Go to the Dashboard page
- Tap the Battery Health Monitor icon
- Tap the Settings button on the top right corner
- Change the high or low voltage threshold.