o2 codes

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    N54 Tunerpro DTC table confusion

    I'm trying to disable some O2 emissions system check codes to diagnose my car. It's giving me a lot of grief throwing heater, function, system check, etc. codes for the Pre-cat O2 sensors on my single turbo setup. AFRs will lean out and it'll drive like s#&t until the codes are cleared. All the...