How do you reset check engine light on Volvo XC70?

To reset the check engine light on a Volvo XC70, you can use an OBD-II scanner to clear the diagnostic trouble codes (DTCs) that triggered the light. Alternatively, disconnecting the car battery for about 15 minutes can also reset the system, but this may also reset other settings. After reconnecting the battery, drive the vehicle for a few miles to see if the light stays off. However, it's important to first address any underlying issues that caused the light to activate.