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post #1 of 14 Old 31st December 2016, 05:37 AM Thread Starter
Craze
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Air intake fault codes

Hi, hoping for some help, have had codes 2b5a come up (bank 2 intake sensor plausibility) come up a lot
Clear it and returns

Swapped mafs left to right and i get 2b12 which is ambient air intake sensor not plausible

Bank 1 is a different code and that one didnt come up when swapped mafs which id imagine if faulty it would

Any idea if its mafs? Have ordered new ones but 2 week wait

Is there another temp sensor aside from mafs? Thanks

M5 E60 Silverstone, evolve tune, eventuri intake

Last edited by Craze; 31st December 2016 at 05:49 AM.
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post #2 of 14 Old 31st December 2016, 06:28 AM
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If the problem is MAF output, the header tune can exacerbate the problem and the fault codes may change.
Try flashing back to stock file and clear/reread.

Look at live output from the MAF's. If there is a large difference from bank to bank (be advised that iat will be slightly higher B2 v. B1 with the eventuri, due to screen orientation) or noticeable spikiness in the data, then one of them is probably bad.
It MAY work in the other side after switching around/fuking with it a few times. Or not.
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post #3 of 14 Old 31st December 2016, 07:39 AM Thread Starter
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Ah ok thanks

Does inpa allow live output??

Will be swapping mafs and injectors as preventative maintenance in about 2 weeks

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post #4 of 14 Old 31st December 2016, 08:42 AM
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IDK

Never got inpa to work used borrowed BAV TECH at that point


Just don't get caught with a bad MAF in one hand and a good one in the other, because someone WILL walk up and ask a question oh shi.t.
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post #5 of 14 Old 31st December 2016, 10:18 AM Thread Starter
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post #6 of 14 Old 31st December 2016, 05:07 PM
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MAFs are installed properly? I recall 1 side has to face oncoming air (airbox direction)
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Last edited by IGNANT; 31st December 2016 at 07:47 PM. Reason: added pic
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post #7 of 14 Old 31st December 2016, 06:02 PM Thread Starter
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post #8 of 14 Old 2nd January 2017, 01:16 PM Thread Starter
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Ah thanks for the pic, they are correct

Does the maf also function as ambient air sensor??

M5 E60 Silverstone, evolve tune, eventuri intake
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post #9 of 14 Old 11th January 2017, 11:47 AM Thread Starter
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New mafs and it logs 2b5a after a couple of drives

It runs perfect

Perhaps combination of intakes and tune? L

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post #10 of 14 Old 11th January 2017, 01:14 PM
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Can you take a pic of the MAF orientation? It's possible with Eventuris to rotate the MAF housing in a non-desirable way. The entrances of a MAF body into an airstream should be perpendicular to any directional changes in flow, so it matters there the bend is and how the MAF is positioned.
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