Half engine light

BDO · 04-27-2011, 11:11 AM

My car (07 335i) has been throwing half engine CEL's for the past week. I took it to BMW and they have diagnosed a faulty HPFP.

However, I don't have any of the HPFP symptoms - no long crank, no rough idle - I can't even feel power loss when the fault occurs.

Are they misdiagnosing things?

Nedim · 04-27-2011, 11:23 AM

Scan your car? could be the vanos solenoids

BDO · 04-27-2011, 11:33 AM

I did have it scanned - it just reported a general limp mode.

PiZauL · 04-27-2011, 12:10 PM

I had the same exact problem you are describing 2 weeks ago, ended up being a faulty knock sensor. But that would come up as a particular code.

04-27-2011, 11:11 AM	#1
BDO Lieutenant 281 Rep 538 Posts Drives: 2016 X6 40d M-sport Join Date: Feb 2011 Location: Citizen of the World iTrader: (0)	Half engine light - not HPFP symptoms My car (07 335i) has been throwing half engine CEL's for the past week. I took it to BMW and they have diagnosed a faulty HPFP. However, I don't have any of the HPFP symptoms - no long crank, no rough idle - I can't even feel power loss when the fault occurs. Are they misdiagnosing things?
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04-27-2011, 11:23 AM	#2
Nedim Captain 72 Rep 716 Posts Drives: 2007 BMW 335i Join Date: Mar 2010 Location: Des Moines, IA iTrader: (4)	Scan your car? could be the vanos solenoids
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04-27-2011, 11:33 AM	#3
BDO Lieutenant 281 Rep 538 Posts Drives: 2016 X6 40d M-sport Join Date: Feb 2011 Location: Citizen of the World iTrader: (0)	I did have it scanned - it just reported a general limp mode.
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04-27-2011, 12:10 PM	#4
PiZauL I6 + TT = FTW 130 Rep 867 Posts Drives: E90 M3, GT350, Tesla M3P Join Date: Jan 2010 Location: Baltimore, MD iTrader: (2)	I had the same exact problem you are describing 2 weeks ago, ended up being a faulty knock sensor. But that would come up as a particular code.
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