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      11-13-2021, 06:57 PM   #2
Dave92N54
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Drives: 09 E92 335i 6MT
Join Date: Nov 2020
Location: Westminster, Maryland

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2009 BMW 335i  [0.00]
It can do so much worse than that. You could end up running too lean under boost, not good. Too rich and you risk diluting your oil, though i'd imagine that would take awhile.

Your codes indicate a damaged O2 heater which is common on install. Should just need a new O2. Did you buy them from FCP? If so just order a new set and get your money back.

Catless downpipe codes should be labeled as shadow codes and are codes: 29F4 & 29F5.

You may also find this useful: https://www.e90post.com/forums/showthread.php?t=1623575
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09 E92 335i 6MT / Alpine White / Coral Red / VRSF 7.5" / VRSF DCI / VRSF Catless Downpipes / VTT Charge Pipe / RB OEM Billet Turbos / CD919 Custom Tune / Bilstein PSS9s
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