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supermann125 · 09-25-2016, 06:02 PM

Just spent two days at the track. First codes popped on the track. Cleared, tracked some more, then second codes popped 100 miles into my drive home.

Any idea?

RollingCoal · 09-25-2016, 06:29 PM

Looks like potential CBU issues

Yozh · 09-26-2016, 12:40 AM

Both 4862 and 3EED point to a faulty MAF. If MAF is gone, very likely corresponding EGR and further NOx efficiency could be affected.

That is one way to spin it. Second way, you have EGR and Swirl Flap code that may point to CBU issues.

I would check running parameters for air flow measurements and intake air temperature at MAF vs. IAT sensor and see how they line-up.

09-25-2016, 06:02 PM	#1
supermann125 Private First Class 45 Rep 182 Posts Drives: 2011 335d Join Date: May 2014 Location: Seattle, WA iTrader: (2)	SES on Just spent two days at the track. First codes popped on the track. Cleared, tracked some more, then second codes popped 100 miles into my drive home. Any idea? Attached Images
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09-25-2016, 06:29 PM	#2
RollingCoal Second Lieutenant 57 Rep 210 Posts Drives: 2011 BMW 335D Join Date: Mar 2016 Location: USA-TN iTrader: (0)	Looks like potential CBU issues
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09-26-2016, 12:40 AM	#3
Yozh Colonel 870 Rep 2,615 Posts Drives: 2011 335d M-Sport Join Date: Mar 2014 Location: Wet Coast iTrader: (4)	Both 4862 and 3EED point to a faulty MAF. If MAF is gone, very likely corresponding EGR and further NOx efficiency could be affected. That is one way to spin it. Second way, you have EGR and Swirl Flap code that may point to CBU issues. I would check running parameters for air flow measurements and intake air temperature at MAF vs. IAT sensor and see how they line-up.
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