oxygen sensor: INCOMPLETE Need advice.

socalbmw

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Dec 20, 2021
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Looking for advice from BMW tec. car is a 2013 335Is N54. I am trying to get my o2 to register. its been reading incomplete. I took the car into Bmw to ask for a total reset/flash. I had MHD backend installed and I was wondering if that had to do with it, so I wanted to rest the car. This Morning the tec texted me saying that a low boost 30FF is showing up as a fault. With that code it is possible that my o2 will not set or register. Does this make sense, before I pay for a smoke leak test.
 
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socalbmw

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Dec 20, 2021
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doublespaces

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Oct 18, 2016
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That's a bit steep especially if you can check for leaks yourself.

Why don't you take a data log with mhd and use the built in MHD feature to upload the log to spoolstreet (swipe on the filename) then share the BB Code of that graph in this post then we can take a look.

If you've got a vacuum leak on the waste gate creating low boost, then you may see high waste gate duty cycle in the logs.