Quote:
Originally Posted by FR-S2GT86
Okay, I'll give you that. But since the OP originally said that he was getting upstream O2 related codes and didn't mention any downstream related codes, that tells me that the tuner may have disabled the downstream codes from being able to trigger a CEL.
One thing the OP didn't mention though, is if the headers that the seller had in there before he sold it were catted or not? If they were not, I would tend to think that the tuner used the O2 input instead of the EVAP input....Which is one reason why the OP should get back with some questions to the seller.
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If it's tuned, it's very unlikely to have downstream codes regardless of kit
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