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01-11-2022, 08:37 AM | #23 | |
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So I swapped my primary O2 sensors and my code remained the same. Also swapped out brand new donut gaskets as well while I was under there. Curious, since we're both from CA, are your monitors all not showing ready? I can't get my O2 and Secondary air monitors to show ready and assuming it's because of my pending code 27B1. |
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01-13-2022, 01:34 PM | #24 |
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27b0...Oh how I know this code well. Chased it for so many years. Finally had it coded out.
I believe this is a result of carbon build up in the ports that you really can't fix without removing lots of stuff.
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01-13-2022, 05:28 PM | #25 |
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Drives: 2011 M3 Coupe
Join Date: Jan 2012
Location: LA,Ca
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Yeah I scoped them when I did the valves but honestly I'm not a mechanic so I'm leaning towards this or my cat.
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