2f71 e-box fan - BMW 3-Series (E90 E92) Forum

watoowatoo · 08-25-2011, 11:37 AM

I got the DME code 2F71 E-Box fan, input signal.
Car was at dealer for service and seems like they didn't care about it since it's still present. I cleared the code but it came back again.
Does anybody know where the E-Box fan fuse is located on 09 35i x6? I suspect it's a blown fuse, any ideas?

cwn23 · 08-25-2011, 11:40 AM

Is that the ecu fan located in the ecu compartment?

EastCoast335i · 08-25-2011, 11:46 AM

Quote:

Originally Posted by watoowatoo

I got the DME code 2F71 E-Box fan, input signal.
Car was at dealer for service and seems like they didn't care about it since it's still present. I cleared the code but it came back again.
Does anybody know where the E-Box fan fuse is located on 09 35i x6? I suspect it's a blown fuse, any ideas?

Had the same issue... Dealer never fixed it til I went in twice and told them to read the codes.
They told me it was a short in the wiring.

watoowatoo · 08-25-2011, 11:49 AM

Yes, it's the fan that cools the ecu box.
http://www.realoem.com/bmw/showparts...96&hg=12&fg=35

watoowatoo · 08-25-2011, 11:55 AM

Quote:

Originally Posted by EastCoast335i

Had the same issue... Dealer never fixed it til I went in twice and told them to read the codes.
They told me it was a short in the wiring.

If i can find the fuse for it I can check the fuse before taking it back to dealer. I have JB4 so Prefer to avoid unnecessary dealer checks in the ecu box

EastCoast335i · 08-25-2011, 01:06 PM

Quote:

Originally Posted by watoowatoo

If i can find the fuse for it I can check the fuse before taking it back to dealer. I have JB4 so Prefer to avoid unnecessary dealer checks in the ecu box

Not sure which fuse it is. May even be a fuse in the ECU box since its related to the ECU fan.
But I did drive with that error for a good 10k miles before finally getting it fixed, so i wouldnt be too concerned about it hurting the car.

watoowatoo · 08-25-2011, 09:36 PM

Quote:

Originally Posted by EastCoast335i

Not sure which fuse it is. May even be a fuse in the ECU box since its related to the ECU fan.
But I did drive with that error for a good 10k miles before finally getting it fixed, so i wouldnt be too concerned about it hurting the car.

That's good to know, fried ecu is not what i like to see. Hopefully somebody can guide me to figure where the fuse is

Bleep · 08-25-2011, 10:04 PM

I've had the same problem for a few months now, following this closely.

Jake@PTF · 08-29-2011, 07:26 AM

Same thing here. Rather annoying always getting this code. I am going to go into the dme box and the fuse panel behind the glove box today and see if any are blown. I will update if i find anything. The retarded diagram our fuse panel comes with isn't much help with just a bunch of squigly pictures...yay bmw.

E90SoFlo · 06-14-2012, 08:56 AM

any update on this? How do you fix it?

EastCoast335i · 06-14-2012, 03:42 PM

Quote:

Originally Posted by E90SoFlo

any update on this? How do you fix it?

Yeah i thought i posted it in an earlier post above...

It was a blown fuse... Dealership fixed it for free since I was still under warranty.

Not sure which fuse or which fuse box.

E90SoFlo · 06-14-2012, 04:35 PM

Quote:

Originally Posted by EastCoast335i

Yeah i thought i posted it in an earlier post above...

It was a blown fuse... Dealership fixed it for free since I was still under warranty.

Not sure which fuse or which fuse box.

correct, i found it earlier as well here it is.

510135 · 06-29-2012, 05:27 PM

Quote:

Originally Posted by E90SoFlo

correct, i found it earlier as well here it is.

Is this picture taken from the ECU box in the engine bay. And was the faulty fuse the 10 amp near your fingers?

dylim · 02-21-2013, 03:47 PM

When I was changing my spark plugs I took a quick look and didn't find the 10amp fuse. Maybe it's buried under one of the large connectors, and you'll have to take the connector out to see the fuse? I keep getting 2f71 too.

08-25-2011, 11:37 AM	#1
watoowatoo Private First Class Drives: 09 35i X6 Join Date: Sep 2008 Location: Montreal Posts: 168 iTrader: (0)	2f71 e-box fan I got the DME code 2F71 E-Box fan, input signal. Car was at dealer for service and seems like they didn't care about it since it's still present. I cleared the code but it came back again. Does anybody know where the E-Box fan fuse is located on 09 35i x6? I suspect it's a blown fuse, any ideas?
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08-29-2011, 07:26 AM	#9
Jake@PTF BimmerPost Supporting Vendor Drives: AW E92 335i Join Date: Dec 2009 Location: DC Metro Posts: 867 iTrader: (7)	Same thing here. Rather annoying always getting this code. I am going to go into the dme box and the fuse panel behind the glove box today and see if any are blown. I will update if i find anything. The retarded diagram our fuse panel comes with isn't much help with just a bunch of squigly pictures...yay bmw. Last edited by Jake@PTF; 08-29-2011 at 07:36 AM.

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08-25-2011, 11:40 AM	#2
cwn23 Major Drives: E92 Join Date: May 2007 Location: USA Posts: 1,150 iTrader: (0)	Is that the ecu fan located in the ecu compartment?

08-25-2011, 11:49 AM	#4
watoowatoo Private First Class Drives: 09 35i X6 Join Date: Sep 2008 Location: Montreal Posts: 168 iTrader: (0)	Yes, it's the fan that cools the ecu box. http://www.realoem.com/bmw/showparts...96&hg=12&fg=35

08-25-2011, 10:04 PM	#8
Bleep First Lieutenant Drives: 335xi Join Date: Jan 2011 Location: Brooklyn NY Posts: 369 iTrader: (0)	I've had the same problem for a few months now, following this closely.

06-14-2012, 08:56 AM	#10
E90SoFlo Banned Drives: E90 335i Join Date: Jun 2011 Location: Naples, FL Posts: 2,682 iTrader: (9)	any update on this? How do you fix it?

02-21-2013, 03:47 PM	#14
dylim Private First Class Drives: 328xi Join Date: Mar 2012 Location: bay area Posts: 179 iTrader: (3)	When I was changing my spark plugs I took a quick look and didn't find the 10amp fuse. Maybe it's buried under one of the large connectors, and you'll have to take the connector out to see the fuse? I keep getting 2f71 too.