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There are various methods to turn off the check engine light on the 2018 Hyundai Sonata. Sometimes, the light will disappear on its own after driving for a while. Another approach is to disconnect the battery for 20 minutes before reconnecting it. If those steps don't succeed, using an electronic scan tool is necessary to identify and resolve the issue. A common reason for the light could be a loose gas cap, which can be checked without a scanner. If the gas cap is not the issue, using the scanner to pinpoint and correct the problem is essential for resetting the light.
To clear the check engine light on your Hyundai Sonata, just plug in an OBD II scanner to the proper port and then follow the instructions to reset the light.