2AAF code

SteveMD · 12-04-2009, 05:05 PM

2AAF

I looked around and couldn't find much on this one but it is a Fuel Pump code.

It's the only shadow code thrown.

No long cranks and no other codes.

enrita · 12-04-2009, 05:16 PM

that comes up if you change chip or disconnect jb3 with the battery on. nothing to worry about.

SteveMD · 12-04-2009, 05:19 PM

Hmm...well I did neither but ok.

I'll erase and check again.

Been running map 5 for a few weeks on a stock car with 93 octane. That was the only code.

deletedelete · 12-04-2009, 05:22 PM

Maybe your fuel pump is going.

enrita · 12-04-2009, 05:41 PM

nope that code is the fuel pump plausability . comes up when there is a signal interruption. i always got it when i disconnected the jb3 during chip change.

deletedelete · 12-04-2009, 05:43 PM

Quote:

Originally Posted by enrita

nope that code is the fuel pump plausability . comes up when there is a signal interruption. i always got it when i disconnected the jb3 during chip change.

Thats good. Funny, that I didnt really know what a fuel pump was until I got my 335. Now I know what it is, how it works and the various hidden ecu codes that it can display.

Alan l. · 12-04-2009, 06:23 PM

I got the same code once and Terry said it's common even on stock cars.

quattr0 · 12-05-2009, 07:25 AM

Quote:

Originally Posted by SteveMD

2AAF

I looked around and couldn't find much on this one but it is a Fuel Pump code.

It's the only shadow code thrown.

No long cranks and no other codes.

You didn't look hard enough. It is listed in the codes list Mr. 5 posted http://www.e90post.com/forums/showthread.php?t=264464

SteveMD · 12-05-2009, 09:11 AM

Quote:

Originally Posted by quattr0

You didn't look hard enough. It is listed in the codes list Mr. 5 posted http://www.e90post.com/forums/showthread.php?t=264464

I did see that and I wasn't happy with 'Short Circuit or whatever diagnosis is given in it.. I wanted to know what caused it. Here is the real answer:

turboawdfanatic · 12-05-2009, 10:33 AM

Looks like you found you're answer.....FYI I posted this in one of the fuel pump dying threads.

Quote:

Originally Posted by turboawdfanatic

The 2AAF in and of itself is not a HPFP code nor is it specific to tuned cars...as it is thrown on completely stock cars as well. Here's some good info on 2AAF. But basically if it does not cause drivability issues or is not thrown with other codes, then BMWNA's stance is that it is left alone.

http://www.bmwtis.com/tsb/bulletins/...p/B130509g.htm

http://www.bmwtis.com/tsb/attachment...fault_tree.pdf

5soko · 12-05-2009, 11:14 AM

i got this code wen my fuel pump was failing. But i got other codes with it aswell.

I have a number of people of getting this code on stock cars aswell.

IMHO nothing to worry about really.

roadkillrob · 10-15-2010, 06:43 AM

If it is the only code you get, no worries, if you get it with a 29DC or 2FBF then your fuel pump is failing - I got a limp and a 29DC with it and needed a fuel pump.

http://www.bmwtis.com/tsb/bulletins/...p/B130509g.htm

stressdoc · 10-17-2010, 08:04 AM

I got this code after (1) switching from 93 BP fuel to Phillips66 93, (2) long (6-7) AM crank, (3) brief engine stutter under moderate load, followed by a yellow half/engine light & limp.

I assumed bad HPFP. I was just about to go on trip to Kansas, so called dealer hoping they could replace HPFP on Sat AM. I drove car home, disconnected battery to clear limp, and drove it to dealer with car running OK. Dealer replaced HPFP after testing it -- EKP function check showed 5.2 bar after 10 min. Replaced HDP, cleared adaptations & codes, but after test drive 2AAF still present. Resubmitted TC case.

???

franzzz · 06-15-2011, 01:58 PM

My car is stock
Sometimes this code appears alone.

My fuel pump is new (march 2011)

CosmosMpower · 06-15-2011, 02:41 PM

I had this code stored, car never threw a CEL, just saw it in the log after I installed my JB4. Cleared it, will see if it comes back in a few days. I didn't have any other codes stored.

sleepergm · 06-16-2011, 01:37 AM

Nothing to worry abt ... I have had it a couple times - just delete.

dzenno · 06-16-2011, 06:31 AM

I have that code all the time, after clearing it it always comes back...

s2k_335i · 06-16-2011, 07:23 AM

Quote:

Originally Posted by roadkillrob

If it is the only code you get, no worries, if you get it with a 29DC or 2FBF then your fuel pump is failing - I got a limp and a 29DC with it and needed a fuel pump.

http://www.bmwtis.com/tsb/bulletins/...p/B130509g.htm

I got this code with 29DC and the car went to a limp mode also. The fuel pump was replaced by the dealer.

dyezak · 06-16-2011, 08:02 AM

You guys realize that Franzz just revived a 2y old dead thread to give the OP an answer? WTF?!?

dyezak · 06-16-2011, 08:04 AM

neilvosko · 12-10-2012, 09:02 PM

what do you mean disconnected jb3 ith chip change? which chip?

how can I clear this code?

Quote:

Originally Posted by enrita

nope that code is the fuel pump plausability . comes up when there is a signal interruption. i always got it when i disconnected the jb3 during chip change.

12-04-2009, 05:05 PM	#1
SteveMD Colonel 196 Rep 2,485 Posts Drives: 2016 F10 535i MSport Join Date: Dec 2005 Location: Raventown! iTrader: (3)	2AAF code - any reason to worry? 2AAF I looked around and couldn't find much on this one but it is a Fuel Pump code. It's the only shadow code thrown. No long cranks and no other codes. __________________ 2006 E90 330i (retired) 2009 E90 335i (retired) 2012 E70 X5 50i M Sport (retired) 2016 F10 535i M Sport
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12-04-2009, 05:16 PM	#2
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	that comes up if you change chip or disconnect jb3 with the battery on. nothing to worry about. __________________ 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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12-04-2009, 05:19 PM	#3
SteveMD Colonel 196 Rep 2,485 Posts Drives: 2016 F10 535i MSport Join Date: Dec 2005 Location: Raventown! iTrader: (3)	Hmm...well I did neither but ok. I'll erase and check again. Been running map 5 for a few weeks on a stock car with 93 octane. That was the only code. __________________ 2006 E90 330i (retired) 2009 E90 335i (retired) 2012 E70 X5 50i M Sport (retired) 2016 F10 535i M Sport
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12-04-2009, 05:22 PM	#4
deletedelete Major General 361 Rep 5,873 Posts Drives: m Join Date: Nov 2008 Location: usa iTrader: (14) Garage List 2013 e92 M3 [0.00] 2011 e93 M3 (sold) [0.00] 2009 335xi (sold) [0.00]	Maybe your fuel pump is going. __________________ ---> Click For xi/xDrive Suspension Compatibility List <---
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12-04-2009, 05:41 PM	#5
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	nope that code is the fuel pump plausability . comes up when there is a signal interruption. i always got it when i disconnected the jb3 during chip change. __________________ 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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12-04-2009, 06:23 PM	#7
Alan l. Major General 5437 Rep 8,809 Posts Drives: 2020 F95 X5M Competition Join Date: Jun 2009 Location: United States iTrader: (9)	I got the same code once and Terry said it's common even on stock cars. __________________
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12-05-2009, 11:14 AM	#11
5soko Brigadier General 333 Rep 4,632 Posts Drives: M5 Join Date: Aug 2007 Location: Brooklyn, NY iTrader: (4)	i got this code wen my fuel pump was failing. But i got other codes with it aswell. I have a number of people of getting this code on stock cars aswell. IMHO nothing to worry about really.
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10-15-2010, 06:43 AM	#12
roadkillrob Major General 863 Rep 5,448 Posts Drives: 08 335i,22 X3M, 2012 C63 Black Join Date: Jul 2007 Location: Boston iTrader: (15)	If it is the only code you get, no worries, if you get it with a 29DC or 2FBF then your fuel pump is failing - I got a limp and a 29DC with it and needed a fuel pump. http://www.bmwtis.com/tsb/bulletins/...p/B130509g.htm __________________ 2022 X3M Brooklyn Grey 2008 E93 335i FBO 2012 Mercedes C63 Black Series Alanite Grey
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10-17-2010, 08:04 AM	#13
stressdoc Moderator 618 Rep 10,855 Posts Drives: BMW i8; Toy 4runner TRD pro Join Date: Jun 2005 Location: Waco TX iTrader: (0)	I got this code after (1) switching from 93 BP fuel to Phillips66 93, (2) long (6-7) AM crank, (3) brief engine stutter under moderate load, followed by a yellow half/engine light & limp. I assumed bad HPFP. I was just about to go on trip to Kansas, so called dealer hoping they could replace HPFP on Sat AM. I drove car home, disconnected battery to clear limp, and drove it to dealer with car running OK. Dealer replaced HPFP after testing it -- EKP function check showed 5.2 bar after 10 min. Replaced HDP, cleared adaptations & codes, but after test drive 2AAF still present. Resubmitted TC case. ??? __________________ My recent ED photos: http://f80.bimmerpost.com/forums/sho....php?t=1026808 my not-so-recent ED: http://www.e90post.com/forums/showthread.php?t=31829 Please join BMWCCA http://bmwcca.org/index.php?pageid=c...&ref_by=300279
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06-15-2011, 01:58 PM	#14
franzzz Captain 142 Rep 931 Posts Drives: BMW M4 Join Date: Feb 2010 Location: ITALY iTrader: (0)	My car is stock Sometimes this code appears alone. My fuel pump is new (march 2011) __________________ BMW F82 M4 Black MHD CS Map - GTS DKG - Navi -Performance Brake RSL1 Pads - USB - DivX-DVD - Bluetooth - VoiceControl - Connect - Apps - Online - H&K - TrafficInfo - SpLimInfo - WhiteMerino- PDC - Cam - Adaptive Led - Antitheft - CP Steering- Performance ST - Adaptive CP Setup - GarageDoorOpen - Pipercross - Stock Exhaust - Mdrivers Pack - 437M Wheels
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06-15-2011, 02:41 PM	#15
CosmosMpower Brigadier General 2051 Rep 3,714 Posts Drives: F87c, GT3, MK7 GTI Join Date: Apr 2011 Location: Frisco, TX iTrader: (1)	I had this code stored, car never threw a CEL, just saw it in the log after I installed my JB4. Cleared it, will see if it comes back in a few days. I didn't have any other codes stored.
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06-16-2011, 01:37 AM	#16
sleepergm Lieutenant 36 Rep 541 Posts Drives: White 335i M-Tech Join Date: May 2007 Location: Hong Kong iTrader: (2)	Nothing to worry abt ... I have had it a couple times - just delete. __________________ 335 E92 - M-Tech - Eisenmann Race - Custom DP -RBturbos / Stage2 - GIAC S2 - Injen CAI - Forge FMIC - Forge DV's - Stri Gauges - ATI Pod - AEM Air/Fuel - Ericsson Carbon Trunk - Carbon Splitters - ER Charge Pipe - ER Engine Cover - Koni FSD - HR Sport - Brembo Racing Brakes - ICONZ custom rims - RPI Scoops - Burger O2 Sim
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06-16-2011, 06:31 AM	#17
dzenno Banned 273 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	I have that code all the time, after clearing it it always comes back...
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06-16-2011, 08:02 AM	#19
dyezak General of the Armies 156 Rep 656 Posts Drives: X5M Join Date: May 2011 Location: Plano, TX iTrader: (1)	You guys realize that Franzz just revived a 2y old dead thread to give the OP an answer? WTF?!?
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06-16-2011, 08:04 AM	#20
dyezak General of the Armies 156 Rep 656 Posts Drives: X5M Join Date: May 2011 Location: Plano, TX iTrader: (1)
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