Check Engine Light vs Service Light


Session ran out - this is resubmtted

I have a 1998 Volvo V70 T5 with manual transmission; my Service light has been on for a couple of months. After two minutes it goes out. Then last week my Check Engine light came on. I had the car diagnosed only to find out I had a misfire in #3 cylinder. The Check Engine light was reset but not the Service light which is still on! Are they related or one in the same? What gives?

Oh, I should mention that I religiously change all my fluids and all belts ands runs famously. The odometer has under 106,000 miles on it.

Thank you , in advance, for your response. . .