Toyota Repair: toy/camery 96, vacuum hoses, scantool

Question
just changed oil, andgunked engine,now the check engine light went on ,Have a guess what to do?

Answer
Take it to a repair shop or the toyota dealer to have the check engine light diagnosed, they will hook up a scantool to see what the trouble code is, I need to know this code before I can have any idea what to tell you.
In the meantime make sure there are no vacuum hoses that became disconnected and the engine is not misfiring, let me know what you come up with.