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spammysammich · 04-16-2023, 12:13 AM

Not having cats in the primary position between the two O2 sensors will trigger a CEL without a tune.

04-16-2023, 12:13 AM	#4
spammysammich Lieutenant Colonel 3073 Rep 1,799 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	Not having cats in the primary position between the two O2 sensors will trigger a CEL without a tune.
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