1. Turn the ignition on but don't start the engine.
2. Press and hold the "0.0/SET" button until "OIL" appears on the display.
3. Press the "▲" button until "- -" appears on the display.
4. Turn the ignition off and then back on.
5. Wait for a few seconds, and the service light should be reset.
If the service light does not reset, you may need to take your car to a dealership or qualified mechanic to have it reset.