My 86 zuk soft top is running strong just like it has for the last 4 years since i put in the new motor but the other day it turned over to 40000 miles and the check engine light turned on. I am wondering how to rest it?

havn't dealt much with the computers on the sammy since mine was all screwed up and I put in a myside but I think the light turns on when a major maintenance interval passes.  "hence the 40k"  if I remember right there should be a switch on the underside of the dash around where the steering column is.  Try switching that.