What are the possibilities that cause the check engine light to stay on? on 2000 Lincoln Town Car

My engine light comes on every time I start the car. I'm wondering what the problem might be.

Asked by for the 2000 Lincoln Town Car
1 answer 1 comment
to many possibilities to list...get it scanned , get codes ,determine then if you need to get further diagnostics,to narrow down the Cause of the code(s)
Thank you.