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Discussion Starter · #1 ·
2002 Taurus ... check engine light comes on and Auto Zone pulls a P0156 code (O2 sensor). Didn't fix it right away .... and now the check engine light is off. I have started the car since the light went off and it stays off. Was this a fluke or does the sensor really need to be replaced?
 

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could be a bad sensor, bad wires or a exhaust leak before the 02 sensor. keep an eye on it and see if it pops up again.
 
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