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I have a track only Elise without a cat. Is the post-cat O2 sensor even needed without a cat? Of course a CEL will show up.

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I have a track only Elise without a cat. Is the post-cat O2 sensor even needed without a cat? Of course a CEL will show up.

Thanks
Get one of the kits to fool it into thinking the sensor is there. Otherwise the CEL being thrown by the missing O2 sensor might mask a real CEL leading to bigger problems.

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I have a track only Elise without a cat. Is the post-cat O2 sensor even needed without a cat? Of course a CEL will show up.

Thanks
No, it's only there for OBDII to see if the cat exists.
 
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