P1057 – Post catalytic convertor fuel trim (FT), bank 1 – too lean (BMW)

By BAT Team (Contact Me)
Last Updated 2023-11-21
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CodeFault LocationProbable Cause
P1057 Post catalytic convertor fuel trim (FT), bank 1 – too lean
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Wiring, downstream exhaust leak, upstream H02S, downstream H02S, ECM

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