What is the CHECK light ? not Check engine light ?

on 1999 Acura TL

I have looked in the 1999 owners manual and there is NO mention of the CHECK light


got a p1259 code where is this located on the vehicle ?

Thank you

Asked by for the 1999 Acura TL
Have you looked in the section that mentions 'emissions' or 'malfunction indicator lamp' maybe? Warning lights.