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      12-29-2025, 09:19 AM   #1
SlowX6M
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Drives: 2021 X6M, 2012 X5, 2018 M2
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Help with codes 2C31 and 2C2C

2012 5.0, just started getting these two codes.
2C31 - Lambda probe in front of catalyst, trim control
2C2C - Lambda probe before catalyst 2, system check

These seem to be O2 sensor codes, before catalytic converter, but I don't understand if they are for different banks, or the same bank? If two different banks, would be strange for both of them to fail at the same time.
Appreciate 0