Recently I had some O2 codes go off on my 14 wrx. My car is tuned on stock turbo with main upgrades being a full catless exhaust, intake, BOV, static suspension. The front O2 is spitting code and I'm just wondering just how much trouble I'm in if it doesn't get fixed soon. I have an appointment to get it fixed this Saturday I'm just curious to others opinions as to what could be the reason for the front O2 sensor on the up pipe to be going off.
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