2003 nissan xterra how to reset the check engine light?

To reset the check engine light on a 2003 Nissan Xterra, you can use an OBD-II scanner to clear the trouble codes that triggered the light. Alternatively, you can disconnect the negative battery terminal for about 15 minutes, which will erase the codes and reset the light. After reconnecting the battery, the check engine light should be off if the underlying issue has been resolved. Always ensure that any underlying issues are addressed before resetting the light.