have a upgraded 2008 solstice GXP, sometimes the cel light comes on and says it has a rich condition bank 1 and lean condition post cat also. I am catless and have a 02 extender. But why does it show does 2 codes at times?

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ScottyKilmer
ScottyKilmer

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you did those mods, all bets are off now, computer is just plain confused. if it runs fine, live with it

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