Engine Malfunction: Reduced power Light Question...

nosey · 11-15-2010, 04:10 PM

so i drove back from vegas to LA and about 3 miles away from home..the engine malfunction with reduced power light came on...it was about 4 and a half hour drive total...

I averaged about 85 mph and engine temp was just below 250 degrees...outside temp ranged from high 50s to low 70s if that matters..

i thought this would happen if engine temp went above 250 but it was just below and when i took off from a redlight, it just came on...i turned off then on my car and it went away..i dont really notice any difference BUT is this something i should get checked out? or can i just ignore it? I hope my sensors arent boggy...

thanks for any input!

enrita · 11-15-2010, 04:18 PM

if you are STOCK take it to the dealer. means something is wrong with the car. Maybe missfires or HPFP going out.

dlbrooks18 · 11-15-2010, 04:42 PM

wouldn't worry at all unless it keeps happening..

ihvabmr · 11-15-2010, 04:45 PM

I had the exact same thing happened to me recently. I also thought it was the hpfp. But after I had the codes pulled, it was actually the Exhaust Vanos Solenoid that threw the codes. Vanos Solenoids are fairly common problems in N54 motor. If you car is still under warranty, bring it to the dealer. If not, bring it to an independent BMW repair facility to have them pull the codes to identify the exact problem. Good luck.

11-15-2010, 04:10 PM	#1
nosey Private First Class 20 Rep 119 Posts Drives: 2012 MW M3 coupe Join Date: Apr 2008 Location: Los Angeles, CA iTrader: (2)	Engine Malfunction: Reduced power Light Question... so i drove back from vegas to LA and about 3 miles away from home..the engine malfunction with reduced power light came on...it was about 4 and a half hour drive total... I averaged about 85 mph and engine temp was just below 250 degrees...outside temp ranged from high 50s to low 70s if that matters.. i thought this would happen if engine temp went above 250 but it was just below and when i took off from a redlight, it just came on...i turned off then on my car and it went away..i dont really notice any difference BUT is this something i should get checked out? or can i just ignore it? I hope my sensors arent boggy... thanks for any input!
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11-15-2010, 04:18 PM	#2
enrita Major General 165 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	if you are STOCK take it to the dealer. means something is wrong with the car. Maybe missfires or HPFP going out. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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11-15-2010, 04:42 PM	#3
dlbrooks18 Brigadier General 164 Rep 3,735 Posts Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (2)	wouldn't worry at all unless it keeps happening.. __________________ 2008 E90 335
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11-15-2010, 04:45 PM	#4
ihvabmr Lieutenant 20 Rep 411 Posts Drives: BMW Join Date: Aug 2010 Location: Earth iTrader: (4)	I had the exact same thing happened to me recently. I also thought it was the hpfp. But after I had the codes pulled, it was actually the Exhaust Vanos Solenoid that threw the codes. Vanos Solenoids are fairly common problems in N54 motor. If you car is still under warranty, bring it to the dealer. If not, bring it to an independent BMW repair facility to have them pull the codes to identify the exact problem. Good luck.
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