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If the check engine light comes on in your Hyundai Santa Fe, it's important to pull over immediately and avoid driving further. Continuing to drive with the check engine light on could cause damage to your vehicle's components, especially if there is a serious issue. Once you have safely stopped, you can use an OBD II scan tool to access the stored code in the ECU. If it's a simple code like a vacuum leak, you can try fixing it by removing and reinstalling your gas cap, resetting the code, and then resuming your drive. However, for more complex codes, you may need to replace certain components in your vehicle to turn off the light on the dashboard.
To clear the check engine light on your Hyundai Santa Fe, you can reset the battery by disconnecting the positive and negative cables, or use an OBD scanner to do it.
You could attempt to clear the code using a reader, but there is a possibility that you will still encounter an issue.