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I honestly think the root cause of this issue will end up being low oil pressure. The reflash is most likely expanding the tolerances at which the error codes will be thrown. That's why most of the cars being reflashed are still having poor idle quality but no new CEL. If the car does not have enough oil pressure going to the OCV's and the cam gears the system will not operate properly. The hypothesis of oil passages being blocked or inadequate seems like a very logical explanation for the problem. This is why I'm hoping that my car gets lemon lawed or a very long warranty applied. I don't want to have to pay for Subaru's screwups down the road.
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