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Will test pipes throw codes for the upstream o2 sensors?

Old 04-05-2016, 05:32 PM
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Dallasmavs92
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Default Will test pipes throw codes for the upstream o2 sensors?

Running non-resonated test pipes (have been for about a year) and I am throwing the post cat sensors (that's a given) but have recently started throwing the pa200&203 or whatever they are upstream/precat sensor. Will test pipes cause this or is it an age thing? 176k miles on my 06.
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Old 04-05-2016, 09:09 PM
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Originally Posted by Dallasmavs92 View Post
Running non-resonated test pipes (have been for about a year) and I am throwing the post cat sensors (that's a given) but have recently started throwing the pa200&203 or whatever they are upstream/precat sensor. Will test pipes cause this or is it an age thing? 176k miles on my 06.
Age.
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