Check engine light comes on when gas gauge gets down to 1/4 tank. I have a 4.6 v-8 auto
Check engine light on 1995 Ford Thunderbird
You will definitely need to have a diagnostic test performed. I do not know if the light is related to fuel level; there is no way to know until you test it. It would be kind of unusual for a gauge issue or sending unit issue to cause a light.