30bb code N54

nicsteez · 09-06-2019, 10:24 PM

Hey guys I have an 07 e90 335i. I did full bolt ons for stage 2+. Drove fine. After I put the MHD stage 2+ map for 93 oct, I test drove around for a few minutes. The second I went for a WOT pull the car started misfiring crazy and the whole car was shaking. Barely limped home. Codes read 30bb (internal DME malfunction or injector malfunction) with misfire on cylinders 4,5, and 6. Anyone had this problem or found a solution? Maybe plugs, coils? Thanks

dpaul · 09-07-2019, 05:26 AM

Your error code signifies internal DME error, not injector failure

Most likely MOSFET failure in the DME. Actually quite common in the MSD80 DME in your MY 2009 335. They can be replaced very inexpensively. Google MOSFET replacement

nicsteez · 09-08-2019, 11:09 AM

Quote:

Originally Posted by dpaul

Your error code signifies internal DME error, not injector failure

Most likely MOSFET failure in the DME. Actually quite common in the MSD80 DME in your MY 2009 335. They can be replaced very inexpensively. Google MOSFET replacement

Just ordered some upgraded mosfets, thank you!

RayLivingston · 09-08-2019, 01:33 PM

Just fixed mine yesterday. $15 in parts, about an hour in labor to replace the FETs. Now runs good as new!

Regards,
Ray L.

nicsteez · 09-08-2019, 02:28 PM

Quote:

Originally Posted by RayLivingston

Just fixed mine yesterday. $15 in parts, about an hour in labor to replace the FETs. Now runs good as new!

Regards,
Ray L.

How much was labor?

RayLivingston · 09-08-2019, 09:12 PM

Quote:

Originally Posted by nicsteez

How much was labor?

$0. Did it myself.

Regards,
Ray L.

09-06-2019, 10:24 PM	#1
nicsteez Enlisted Member 10 Rep 43 Posts Drives: BMW 335i Join Date: Aug 2019 Location: Buffalo, NY iTrader: (0)	30bb code N54 Hey guys I have an 07 e90 335i. I did full bolt ons for stage 2+. Drove fine. After I put the MHD stage 2+ map for 93 oct, I test drove around for a few minutes. The second I went for a WOT pull the car started misfiring crazy and the whole car was shaking. Barely limped home. Codes read 30bb (internal DME malfunction or injector malfunction) with misfire on cylinders 4,5, and 6. Anyone had this problem or found a solution? Maybe plugs, coils? Thanks
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09-07-2019, 05:26 AM	#2
dpaul Lieutenant Colonel 654 Rep 1,893 Posts Drives: 2009 E90 335xi, 2011 E93 M3 Join Date: Dec 2012 Location: Boston iTrader: (3)	Your error code signifies internal DME error, not injector failure Most likely MOSFET failure in the DME. Actually quite common in the MSD80 DME in your MY 2009 335. They can be replaced very inexpensively. Google MOSFET replacement
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09-08-2019, 01:33 PM	#4
RayLivingston Lieutenant 140 Rep 445 Posts Drives: '07 335i Sedan Join Date: Aug 2018 Location: California iTrader: (0)	Just fixed mine yesterday. $15 in parts, about an hour in labor to replace the FETs. Now runs good as new! Regards, Ray L.
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