What does this mean on 1994 Cadillac Seville SLS

My check engine light isn't on but on the message board it says service engine soon. What does that mean? It's a 1994 seville

Asked by for the 1994 Cadillac Seville SLS
3 answers
See owners manual.!
that is the ck eng light on that vehicle.
Could mean several different issues; mine did the same at first then the service engine icon would come on intermittely from day to day or whenever. You need to have your mechanic do a test to see what codes come up. Mine was the transmission torque converter seal. I elected not to have the dealership rebuild my transmission just service it (no metal in the old fluid) I lived with it for 6 years until my transmission started slipping 3 months ago. I was lucking the slip was only when I was in OD. I just had the work done this week and she is driving like a new car!