This is a message that appears on my Volvo S80 after driving for a period of time. Interestingly, this message appears even though I have not driven the car for the recommended service interval - 7500 miles, or about 12000km.
Did some research and it turns out that this message is displayed as a function of hours the engine has been running, duration since last service and distance covered. Essentially, this light will come on at 7,500 mile (12,000 km) intervals, after 750 hours of driving or after 12 months, whichever occurs first, to remind the driver that the service interval has been exceeded.
The light will stay on for 2 minutes after start until reset.
Here's how to reset this message without using a professional interface equipment:
1. Put the key in and turn it to ignition position I
2. Press and hold in the reset button for the trip odometer
3. Turn the key to ignition position II. Note! Turn the key to position II within 2 seconds.
4. Hold the reset button for the trip meter pressed in until the original value has been reset. *Note: For all vehicles from the 2003 model year a general yellow lamp will light when the reset button must be released.*
5. Release the reset button for the trip odometer within 4 seconds. The instrument gives an audible signal when resetting has succeeded
6. If the trip meter is already reset the reset button should be held in for a minimum of 10 seconds and a maximum of 14 seconds. *If the reset button for the trip odometer is not released within 4 seconds, the service reminder indicator (SRI) is not reset.*