How do you turn off the service light in a 2001 Volvo s40?

To turn off the service light in a 2001 Volvo S40, first, insert the key into the ignition and turn it to the "II" position without starting the engine. Then, press the gas pedal three times within five seconds. This should reset the service light. If it doesn't turn off, you may need to check for any remaining issues or consult the vehicle's manual for additional troubleshooting steps.