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Rear O2 sensor question

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Old Jan 28, 2004 | 07:12 AM
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Steve98Z's Avatar
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From: Texas
Default Rear O2 sensor question

Correct me if I am wrong but the rear O2 sensors have no effect on the air/ fuel or anything else they are just there to confirm that the cats are working? The reason I am asking is I will be driving with open headers to the muffler shop then I will be driving with no rear o2's for a dyno tune.
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Old Jan 28, 2004 | 08:57 AM
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The rear O2's are only for verifying that the cats are working. You may throw an SES light, but it will have no affect on performance during the dyno tune.
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