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Old 07-01-2009, 10:08 AM
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Angry Failed Ohio E Check

Well I failed the Ohio E Check today.

My Readings Were

HC Reading 45.2 State Limit 117.0 PASS
CO Reading 0.36 State Limit 0.65 PASS
NO Reading 1327.8 State Limit 821.0 FAIL


I went home and replaced my O2 Sensor thinking that would do the trip but upon returning I failed again.

Is there a list of what else it could be? I know a bad converter would do the trick but Auto Zone said that high NO levels usually point to O2 Sensor. If the O2 sensor was the culprit and I changed it and then drove back and got retested did I go to fast? Should I have driven the car abit with the new sensor before getting it tested?

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Old 07-01-2009, 06:40 PM   #2
 
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Sorry, autozone isn't on the money here. 98 percent of the time, if your NO is high it is ABSOLUTELY pointing to a bad/worn out Cat converter. Now is it possible that a faulty O2 sensor caused a rich mixture that ran the converter too hot and melted it down, thus rendering it useless?? yes.

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Old 07-01-2009, 07:16 PM   #3
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How far did you run it after replacing the o2 sensor? Was the engine good and hot? Was it raining or very humid? All these things can effect your reading.
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