06 330i won't rev

bdbmw · 11-18-2019, 08:55 PM

Hi all- did some searching but not finding. 06 330i bought in May and all was good, drove home from NY to CT no issues. Sitting in the garage ever since, minor front end accident need to take care of. Backed out of the garage, up driveway, no power, won't rev above 2k. When in garage I pulled airbox and noticed I forgot to plug sensor lead back in. Plugged back in but still no rev above 2k. Does it need to 'learn'? Is this limp home mode somehow? I'm totally new to BMW, DIY car guy good at changing parts but light on diagnosing. ANy help would be great. Thanks

smallseafishie · 11-19-2019, 01:21 PM

The plug under right after the airbox is the MAF. If left unplug, you will have a check engine light but it will run open loop. Why did you unplug it or was it the previous owners?

Open loop will not restrict your RPMs to below 2k. Start by having your error codes read. Not doing that is like shooting in the dark.

bdbmw · 11-20-2019, 04:53 PM

Thanks for reply. Borrowed a reader, see what pops up.

E92William · 11-27-2019, 06:44 AM

You need to scan it with a proper deep scanner that reads shadow codes and such. Not some autozone Chinese gimmick. That's the first step.

RogerN · 12-04-2019, 11:46 AM

Camshaft Position Sensor perhaps, did you get this solved?

11-18-2019, 08:55 PM	#1
bdbmw Registered 0 Rep 2 Posts Drives: 2006 E90 330i sport pkg Join Date: Aug 2019 Location: CT iTrader: (0)	06 330i won't rev Hi all- did some searching but not finding. 06 330i bought in May and all was good, drove home from NY to CT no issues. Sitting in the garage ever since, minor front end accident need to take care of. Backed out of the garage, up driveway, no power, won't rev above 2k. When in garage I pulled airbox and noticed I forgot to plug sensor lead back in. Plugged back in but still no rev above 2k. Does it need to 'learn'? Is this limp home mode somehow? I'm totally new to BMW, DIY car guy good at changing parts but light on diagnosing. ANy help would be great. Thanks
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11-19-2019, 01:21 PM	#2
smallseafishie Colonel 110 Rep 2,017 Posts Drives: AW 07 e92 335i + AW 11 X5 35d Join Date: Jun 2007 Location: Atlanta GA iTrader: (13) Garage List 2007 E92 335i [0.00]	The plug under right after the airbox is the MAF. If left unplug, you will have a check engine light but it will run open loop. Why did you unplug it or was it the previous owners? Open loop will not restrict your RPMs to below 2k. Start by having your error codes read. Not doing that is like shooting in the dark.
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11-20-2019, 04:53 PM	#3
bdbmw Registered 0 Rep 2 Posts Drives: 2006 E90 330i sport pkg Join Date: Aug 2019 Location: CT iTrader: (0)	Thanks for reply. Borrowed a reader, see what pops up.
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11-27-2019, 06:44 AM	#4
E92William Banned 1998 Rep 2,026 Posts Drives: 2008 E92 328xi Join Date: Nov 2019 Location: Miami iTrader: (0) Garage List 2008 BMW 328xi [0.00]	You need to scan it with a proper deep scanner that reads shadow codes and such. Not some autozone Chinese gimmick. That's the first step.
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12-04-2019, 11:46 AM	#5
RogerN New Member 3 Rep 10 Posts Drives: 08' 335I E92 Join Date: Nov 2019 Location: VIRGINIA iTrader: (0)	Camshaft Position Sensor perhaps, did you get this solved?
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