Half engine light came on, who has dealt with this?

socalsun · 08-26-2010, 05:55 PM

Driving yesterday, nothing serous, the half engine power light came on in yellow. I parked it, shut my car off for a few then turned it back on and it was gone and has not come back since. I know others have dealt with this from searching around. Was it related to any service that needed to take place? I'm just trying to figure out what to do or maybe what to look out for. Thanks.

mithiral67 · 08-26-2010, 06:17 PM

are you running any mods? What temp and how hard where you driving the car? Could you repeat it?

socalsun · 08-26-2010, 07:31 PM

Quote:

Originally Posted by mithiral67

are you running any mods? What temp and how hard where you driving the car? Could you repeat it?

Dinan tune, catle$$, Milltek exhaust, stett charpe pipe, forge DV's, Helix fmic and some other minor ones. I wasn't driving hard at all and the temp was normal, I was bringing my girl home from work just crusin for about 20-30 mins, just every day drivin...

dlbrooks18 · 08-26-2010, 07:44 PM

i wouldn't worry too much about it, scan for codes..

Brad427435 · 08-26-2010, 07:51 PM

I have had the same issue occur a number of times in the last couple of months, in my 2007 E92 with no mods at all (yet). The engine trouble light coming on, with degraded power until the engine is turned off, then all is fine.

I went to the local dealer a few weeks ago, and after a pretty long system check and test drive they came back and and asked me if I was filling up with "bad gas", meaning from Walmart/Murphy Oil, Food City (a grocery chain in TN), and some others.

In fact I had, with 92 octane premium. I was told that this "bad gas" can somehow trigger fuel flow (I think) fault codes, even if there is no actual issue with the engine. In my case, he said my engine was running perfectly, but that until all the old gas has cleared out of the tank, I might get another fault code, requiring another trip to the dealer to clear it (I don't yet have another way to clear codes). And that has happened a couple of times since.

Pretty annoying...

mithiral67 · 08-26-2010, 08:26 PM

Ha, yea. Scan for codes.

socalsun · 08-27-2010, 12:21 PM

Quote:

Originally Posted by Brad427435

I have had the same issue occur a number of times in the last couple of months, in my 2007 E92 with no mods at all (yet). The engine trouble light coming on, with degraded power until the engine is turned off, then all is fine.

I went to the local dealer a few weeks ago, and after a pretty long system check and test drive they came back and and asked me if I was filling up with "bad gas", meaning from Walmart/Murphy Oil, Food City (a grocery chain in TN), and some others.

In fact I had, with 92 octane premium. I was told that this "bad gas" can somehow trigger fuel flow (I think) fault codes, even if there is no actual issue with the engine. In my case, he said my engine was running perfectly, but that until all the old gas has cleared out of the tank, I might get another fault code, requiring another trip to the dealer to clear it (I don't yet have another way to clear codes). And that has happened a couple of times since.

Pretty annoying...

Interesting, I recently switched gas, could only get 91 in socal, now I get 93 on the east coast from a different company.

Dvdman · 08-27-2010, 12:51 PM

That happened to me when I had Long cranks in the morning. I just brought it in an it was my HPFP.

andy92782 · 08-27-2010, 07:30 PM

It's probably the VANOS issue / wear on the cam bearing ledges. My car had this problem.

Brian135i · 08-28-2010, 04:37 AM

+1 on VANOS issue.

jagdeepj123 · 08-29-2010, 09:16 PM

Quote:

Originally Posted by socalsun

Interesting, I recently switched gas, could only get 91 in socal, now I get 93 on the east coast from a different company.

After I had bought my e92 335i, I frequently used to get the same 'limp mode' light you describe - Always after I had accelerated hard >5k revs.

Changed to 99 Octane (Shell V-Power) petrol and now light has gone away. I'm in UK so reckon you guys use different octane measurements. (UK is AKI i think - check Wikipedia for sure)

Basically, use as a high an octane rating gas as you can get. It gives more power (upto 20bhp), as well as preventing the half-power light.

08-26-2010, 05:55 PM	#1
socalsun poor 8 Rep 136 Posts Drives: Girl's XC90 Join Date: May 2009 Location: VT iTrader: (3)	Half engine light came on, who has dealt with this? Driving yesterday, nothing serous, the half engine power light came on in yellow. I parked it, shut my car off for a few then turned it back on and it was gone and has not come back since. I know others have dealt with this from searching around. Was it related to any service that needed to take place? I'm just trying to figure out what to do or maybe what to look out for. Thanks. __________________ Previous: 07 E92 335i - Dinan 01.5 B5 S4 - APR
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08-26-2010, 06:17 PM	#2
mithiral67 That guy 120 Rep 5,740 Posts Drives: 2015 Cayman GTS Join Date: Jun 2008 Location: Chicago Burbs iTrader: (4) Garage List 2015 Porsche Cayman ... [0.00]	are you running any mods? What temp and how hard where you driving the car? Could you repeat it?
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08-26-2010, 07:44 PM	#4
dlbrooks18 Brigadier General 164 Rep 3,735 Posts Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (2)	i wouldn't worry too much about it, scan for codes.. __________________ 2008 E90 335
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08-26-2010, 07:51 PM	#5
Brad427435 New Member 0 Rep 10 Posts Drives: 2007 E92 Monaco Blue Join Date: Aug 2009 Location: East Tennessee iTrader: (0) Garage List 2007 335i Coupe [0.00]	I have had the same issue occur a number of times in the last couple of months, in my 2007 E92 with no mods at all (yet). The engine trouble light coming on, with degraded power until the engine is turned off, then all is fine. I went to the local dealer a few weeks ago, and after a pretty long system check and test drive they came back and and asked me if I was filling up with "bad gas", meaning from Walmart/Murphy Oil, Food City (a grocery chain in TN), and some others. In fact I had, with 92 octane premium. I was told that this "bad gas" can somehow trigger fuel flow (I think) fault codes, even if there is no actual issue with the engine. In my case, he said my engine was running perfectly, but that until all the old gas has cleared out of the tank, I might get another fault code, requiring another trip to the dealer to clear it (I don't yet have another way to clear codes). And that has happened a couple of times since. Pretty annoying...
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08-26-2010, 08:26 PM	#6
mithiral67 That guy 120 Rep 5,740 Posts Drives: 2015 Cayman GTS Join Date: Jun 2008 Location: Chicago Burbs iTrader: (4) Garage List 2015 Porsche Cayman ... [0.00]	Ha, yea. Scan for codes.
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08-27-2010, 12:51 PM	#8
Dvdman Major 181 Rep 1,000 Posts Drives: 2022 X5 and 2007 M6 Join Date: Aug 2009 Location: Chicago, IL iTrader: (2)	That happened to me when I had Long cranks in the morning. I just brought it in an it was my HPFP.
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08-27-2010, 07:30 PM	#9
andy92782 Private First Class 7 Rep 164 Posts Drives: '10 C2S, '04 4Runner 4x4 V8 Join Date: Feb 2007 Location: OC, CA iTrader: (0)	It's probably the VANOS issue / wear on the cam bearing ledges. My car had this problem.
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08-28-2010, 04:37 AM	#10
Brian135i Lieutenant 49 Rep 469 Posts Drives: BMW 16' M3 Join Date: Aug 2009 Location: Oxnard, CA iTrader: (1) Garage List 2009 BMW 135i [0.00]	+1 on VANOS issue.
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