Reset check engine light on Mazda 3 2008?

To reset the check engine light on a 2008 Mazda 3, you can use an OBD-II scanner to clear the trouble codes stored in the vehicle's computer. Alternatively, you can disconnect the negative battery terminal for about 15-30 minutes, then reconnect it to reset the system. However, it's important to address the underlying issue that triggered the check engine light before resetting it. If the light comes back on, it indicates that there's still a problem that needs attention.