How do reset check engine light on a 2003 hyundai?

To reset the check engine light on a 2003 Hyundai, you can disconnect the car's battery by removing the negative terminal for about 10-15 minutes. This will clear the onboard computer's memory and reset the light. Alternatively, you can use an OBD-II scanner to read and erase the trouble codes that triggered the light. However, if the underlying issue isn't resolved, the light may come back on.