Service Light ( wrench icon ) no codes??

2002 Chevrolet Cavalier has the Service (wrench) light on, but no engine codes.

I figured this out, but saw no post on her explaining...

I Service (wrench) light on the left side of dash indicates BCM (body computer) codes.

Very common is the light to come on after shifting into drive (DRL light will flash first). This indicates DRL daytime running lamps error.... probably burned out bulb.