I have a 1993 Volvo 940. Recently, the check engine light illuminated on the Dashboard but goes out routinely after ~2 minutes. Can anyone advise me where the recent button is located that will reset this light such that it will not come on. The OBD revealed no problem so I suspect that the light has come on as a function of odometer mileage.

Many thanks!

OnlyVolvo

That's not a "Check Engine" light, that's a service light that reminds the owner to service their car such as an oil change etc. Once you service your Volvo, you can reset that light by removing a little robber plug on your dash and pressing on the pin using a pen or something similar. And i thing that light comes on every 3k or 4k miles to remind again.

Are you sure it is the "check engine" light? What you described is the "service" light. They are not the same.

Check Engine is a detected emission related failure.
Service light is oil change interval - 5,000 mile / 8,000 kms. It can be reset by removing the rubber plug located left of speedo, and firmly depressing the button behind it using a ball-point pen or philips head screwdriver. Push again if light comes on again on next start.