After replacing faulty part how do you get the check engine light off? on 2001 Buick LeSabre

How do you turn the check engine light off?

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2 answers
You need a code reader or scanner to reset OBD II codes. If you don't have one your local auto parts store like Advance, Auto Zone, O'Reilleys will do it free.
You can also disconnect the neg battery terminal for 10 seconds or more, then reconnect.