How do I get rid of check engine light? on 1992 Lexus LS400

I have tried everything.

Did test, did tuneup.

Replaced a lot of sensors.

Asked by for the 1992 Lexus LS400
Define "everything". What "test"? What is a tune-up? Define "a lot of sensors". What SPECIFIC DTCs did you get with the code reader? "tried everything" would need to include a scanner with LIVE data. What can we do to help?
I need to know what I NEED to do to get the engine light off so I CAN get the smog done. Thanks, Deborahhurst

1 more answer
Take it to a qualified mechanic for diagnosis and repair!!