How to tell if your O2 sensor is messed up?
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Joined: Sep 2001
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From: Orange County
How to tell if your O2 sensor is messed up?
will the only way be with the CEL? i'm doing smog soon and i need a good working O2 sensor. since i converted to ODB1, i ran a test pipe and left the O2 sensor there. dont know if it's still good. i took it out and it's all black. 
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