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Upstream of catalyst O2 sensor bank 1 failure

Discuss problems you have had or are having with your Z4
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05_3.0i_zoom
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Upstream of catalyst O2 sensor bank 1 failure

Post by 05_3.0i_zoom » Wed Oct 05, 2022 8:46 pm

Hi all,
z4 is running rich and experiencing low mpg, after a quick scan seeing sensor failure.
In addition, carly shows cylinders 1 5 3 6 4 2 misfire
Could this be related to the O2 sensor failing?
Also, after searching bank 1 means cylinders 1 2 3 but can't be sure which sensor needs replacing :(
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Smartbear
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Upstream of catalyst O2 sensor bank 1 failure

Post by Smartbear » Wed Oct 05, 2022 10:26 pm

Hi, upstream of the cat means the sensor closest to the engine (on bank1).
Rob
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e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

05_3.0i_zoom
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Upstream of catalyst O2 sensor bank 1 failure

Post by 05_3.0i_zoom » Wed Oct 05, 2022 10:43 pm

Thank you! I have highlighted it on the pic off of yt
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05_3.0i_zoom
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Upstream of catalyst O2 sensor bank 1 failure

Post by 05_3.0i_zoom » Wed Oct 05, 2022 10:50 pm

The parts in partsgeek is what got me confused lol as well
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