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Q: 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.

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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

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