I am trying to identify a part from the exhaust. on 1991 Buick Century

I found a part on the garage floor, looks like it came from the exhaust area and may be a sensor. Has exhaust carbon on it and has the #019 on the rim. Has plastic insert inside tapered tube

Asked by for the 1991 Buick Century
Does this component have wires attached to it? Do you have an exhaust leak now that this part is no longer on the car?
Google search -Google images- oxygen sensor Does the part look like any of these images?
if you don't find an answer to your question if you want to take a digital picture and send it to me I will see if I can identify it for you
put in title Repairpal question