Q: service vehicle soon lite on 2001 Oldsmobile Intrigue

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
how do I clear codes?trouble started with key left on @ battery run all way down.abs@ trac off lites on intermitting.never had problem till batt.
(1) Answer
You can disconnect the Battery NEGATIVE cable for 1 minute. That will do the trick. If the "Service Engine Soon" light comes back on, then you have a real issue that needs further attention i.e have the codes retrieved and diagnosed.