Volvo: 92 volvo 740 wagon (none turbo), volvo 740, rubber plug

Question
hi, sorry to bother you but, my question is...
my service engine light has come on and, im not sure what it could be. the light only stays on for a couple of 90 seconds then goes off. what could i do to solve this probelm.

Answer
Bruce,
The service light is timed by mileage to come on every 5000 miles. It means that the car needs service ie oil and filter and safety inspection, or more depending on the mileage. There is a small button possibly behind a rubber plug on the face of the cluster. Push that button in and that will reset the light.