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Had o2 sensor replaced in my 1997 Hyundai elantra why wont the check engine light turn off?
Wiki User
∙ 15y ago
1of 2 things..... 1.) either the techs forgot to clear the error code from the cars computer system or 2.) something else is saying it has a problem, thus causing the Check Engine Light to come on. Take your car to the mechanic or just about any service station or Auto Zone (or other parts store) and they will typically clear it for free. If it then comes back on you need to get the computer looked at again to see what the problem is now. You can also clear your own computer by disconnecting the Negative cable from the battery for about a minute, but this will also cause you to lose radio stations programmed in your radio. Typically it is much easier to go to the Parts Store, they can clear it in less than a minute.
Wiki User
∙ 15y ago
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