P2AAF (Fuel pump plausibility) code with Cobb AP.

PeteW84 · 10-01-2011, 02:51 PM

Hey folks, my car has been throwing the P2AAF code (fuel pump plausibilty) eversince I installed the AP two weeks ago. Is this a common issue, or is my recalled hpfp going south?

The cars pulls like a mad ape, with no hick ups nor long cranks. No cels or limp modes at all. I can beat on it all day long, and still don't get any limp modes. The car is super smooth, pull after pull with no issues, besides the damn code that keeps coming back. So is anyone else having the same issue? I would love to hear from you

, thanks a lot.

themyst · 10-01-2011, 02:53 PM

Yep a lot of us are throwing that code. Doesn't seem to mean the car is unhealthy in any way though.

statelax3 · 10-01-2011, 03:20 PM

mine throws it too. if you look at the log cobb has a low value of 625 for pressure. mine usually runs 600 at idle. no reason to be alarmed.

Bleep · 10-01-2011, 03:22 PM

By itself the code isn't a cause for alarm. When it pops up along with some other code is concerning.

PeteW84 · 10-01-2011, 07:23 PM

Thanks a lot guys

.

bmwm3redblack · 10-02-2011, 07:51 AM

My car is pretty much the same,runs like a beast no limps,but this code appears every time!!!

bimmertt · 02-20-2012, 04:52 PM

Checked my car randomly today for any codes and saw that I had this code. Is this a bug? If so, has the firmware been updated to address it?

bigdnno98 · 02-20-2012, 05:12 PM

I've gotten it since I've been tuned. Both Cobb and JB4. No issues from what I've been told.

rooringhusky · 02-20-2012, 05:23 PM

Ive had this code ever since I have installed my Cobb AP...Car is still running strong without any issues

BUT it does always keep me worried in the back of my head that the fuel pump is dying or on its way out...

rooringhusky · 02-20-2012, 05:24 PM

Quote:

Originally Posted by bigdnno98

I've gotten it since I've been tuned. Both Cobb and JB4. No issues from what I've been told.

bigdnno98...now that I think about it I think I had the code when I ran the JB4 as well...Were in the same boat glad to know im not alone..!

JamesM3M5 · 02-20-2012, 05:36 PM

http://www.e90post.com/forums/showpo...68&postcount=9

D_Smiderreen · 11-14-2012, 05:27 PM

That’s weird, I was code free until I started messing around with E85 and the Cobb E30 maps. I hope it’s not LPFP related

Jeffman · 07-15-2013, 09:39 AM

Quote:

Originally Posted by D_Smiderreen

That’s weird, I was code free until I started messing around with E85 and the Cobb E30 maps. I hope it’s not LPFP related

I also notice it only with E85 usage. I got it this morning just after two 2000-6000 WOT pulls in third gear. I'm running a mildly agressive (18 psi but not lots of extra timing) PTF E20 map. Didn't get this code earlier in the week during adaptations, grocery store "runs", etc. It looks like my LPFP dipped down to about 43 psi during the run, adn the HPFP dipped down to about 2200 psi. Anyone have any ideas?

BMWM.D. · 07-15-2013, 08:19 PM

Quote:

Originally Posted by Jeffman

I also notice it only with E85 usage. I got it this morning just after two 2000-6000 WOT pulls in third gear. I'm running a mildly agressive (18 psi but not lots of extra timing) PTF E20 map. Didn't get this code earlier in the week during adaptations, grocery store "runs", etc. It looks like my LPFP dipped down to about 43 psi during the run, adn the HPFP dipped down to about 2200 psi. Anyone have any ideas?

I get this fault code stored when I run 30% ethanol, but never saw it when I was running 20% -- though I was on a less aggressive map on the 20%.

I wouldn't be too worried about this fault on it's own. I see this code on a lot of stock cars. BMW even has a service bulletin stating not to worry about it unless there are other fuel system related faults stored. As long as your AFR and fuel trims look good, I wouldn't be worried. It is a sign that you might be reaching the limits of the stock in-tank pump, though.

BQTuning · 07-15-2013, 09:21 PM

I get this code when I go more than E25.

Jeffman · 07-16-2013, 09:28 PM

Quote:

Originally Posted by BMWM.D.

I get this fault code stored when I run 30% ethanol, but never saw it when I was running 20% -- though I was on a less aggressive map on the 20%.

I wouldn't be too worried about this fault on it's own. I see this code on a lot of stock cars. BMW even has a service bulletin stating not to worry about it unless there are other fuel system related faults stored. As long as your AFR and fuel trims look good, I wouldn't be worried. It is a sign that you might be reaching the limits of the stock in-tank pump, though.

J. Dub · 08-20-2015, 09:16 PM

Just got this code today with p0303, and p29cf.
I'm also on cobb v3

alexg212 · 08-20-2015, 09:23 PM

I had this with my cobb tune, but with some hesitation sometimes. A new lpfp sensor resolved it.

J. Dub · 08-20-2015, 11:18 PM

Quote:

Originally Posted by alexg212

I had this with my cobb tune, but with some hesitation sometimes. A new lpfp sensor resolved it.

Strangely I have no hesitation. I cleared the codes and they haven't come back.
I'm wondering if I should get one step colder plugs perhaps?

10-01-2011, 02:51 PM	#1
PeteW84 COBB'ed 65 Rep 2,228 Posts Drives: 13 Mini Cooper S Join Date: Apr 2008 Location: Tinley Park, IL iTrader: (1) Garage List 2008 335i [7.56]	P2AAF (Fuel pump plausibility) code with Cobb AP. Hey folks, my car has been throwing the P2AAF code (fuel pump plausibilty) eversince I installed the AP two weeks ago. Is this a common issue, or is my recalled hpfp going south? The cars pulls like a mad ape, with no hick ups nor long cranks. No cels or limp modes at all. I can beat on it all day long, and still don't get any limp modes. The car is super smooth, pull after pull with no issues, besides the damn code that keeps coming back. So is anyone else having the same issue? I would love to hear from you, thanks a lot. __________________ 13 Mini Cooper S 08 E92 335i (SOLD)
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10-01-2011, 02:53 PM	#2
themyst Major General 178 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	Yep a lot of us are throwing that code. Doesn't seem to mean the car is unhealthy in any way though. __________________ E90 LCI N54 6AT
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10-01-2011, 03:20 PM	#3
statelax3 Second Lieutenant 58 Rep 210 Posts Drives: 991.1 GTS Join Date: Jul 2011 Location: charlotte nc iTrader: (0)	mine throws it too. if you look at the log cobb has a low value of 625 for pressure. mine usually runs 600 at idle. no reason to be alarmed.
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10-01-2011, 03:22 PM	#4
Bleep First Lieutenant 9 Rep 369 Posts Drives: 3 Join Date: Jan 2011 Location: CT iTrader: (0)	By itself the code isn't a cause for alarm. When it pops up along with some other code is concerning.
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10-01-2011, 07:23 PM	#5
PeteW84 COBB'ed 65 Rep 2,228 Posts Drives: 13 Mini Cooper S Join Date: Apr 2008 Location: Tinley Park, IL iTrader: (1) Garage List 2008 335i [7.56]	Thanks a lot guys . __________________ 13 Mini Cooper S 08 E92 335i (SOLD)
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10-02-2011, 07:51 AM	#6
bmwm3redblack Captain 59 Rep 886 Posts Drives: BMW ///M3 E46, BMW E92 335Xi Join Date: Jan 2011 Location: e13 osl iTrader: (0)	My car is pretty much the same,runs like a beast no limps,but this code appears every time!!!
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02-20-2012, 04:52 PM	#7
bimmertt Lieutenant Colonel 93 Rep 1,794 Posts Drives: 2007 e92 335i Join Date: Nov 2008 Location: Earth iTrader: (7)	Checked my car randomly today for any codes and saw that I had this code. Is this a bug? If so, has the firmware been updated to address it?
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02-20-2012, 05:12 PM	#8
bigdnno98 Real Car Enthusiast 288 Rep 2,081 Posts Drives: 340xi Join Date: Jul 2011 Location: Germany iTrader: (8)	I've gotten it since I've been tuned. Both Cobb and JB4. No issues from what I've been told.
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02-20-2012, 05:23 PM	#9
rooringhusky Objects in the mirror are losing 105 Rep 1,133 Posts Drives: 2007 BMW 335i E92 AW/CR 6MT Join Date: Mar 2011 Location: Socal (OC/Riverside) iTrader: (19) Garage List 2007 BMW 335i [10.00]	Ive had this code ever since I have installed my Cobb AP...Car is still running strong without any issues BUT it does always keep me worried in the back of my head that the fuel pump is dying or on its way out... __________________ PERFORMANCE: JB4 G5 \ Backend Flash \ DCI \ BMS Downpipes \ CX FMIC \ ER Chargepipe \ Synapse BOV \ KW V2 \ Muffler Delete \ CDV \ ZHP Shifter \ Cyba Scoops FUN: M3 Front \ Mtech Rear \ JL 10W6 \ ModMyNav \ V1 Hardwired \ LUX H8 \ Gloss Black Trim \ Gloss Black Roof \ Cyba Quads \ Cyba Mtech Diffuser
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02-20-2012, 05:36 PM	#11
JamesM3M5 Some dude 92 Rep 1,780 Posts Drives: E92 335i Join Date: Sep 2011 Location: Northern VA iTrader: (0)	http://www.e90post.com/forums/showpo...68&postcount=9 __________________ RRT E92 335i/6MT with stuff and things
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11-14-2012, 05:27 PM	#12
D_Smiderreen Banned 13 Rep 156 Posts Drives: Please delete my account Join Date: Nov 2009 Location: please delete my account iTrader: (1)	That’s weird, I was code free until I started messing around with E85 and the Cobb E30 maps. I hope it’s not LPFP related
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07-15-2013, 09:21 PM	#15
BQTuning Banned 469 Rep 4,392 Posts Drives: 2012 Z4 sDrive35i M Sport 6MT Join Date: Nov 2010 Location: bq@bqtuning.com iTrader: (0)	I get this code when I go more than E25.
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08-20-2015, 09:16 PM	#17
J. Dub Bob Saget 356 Rep 2,229 Posts Drives: 2010 335i e92 N54 A/T Join Date: Jun 2010 Location: AR - 501 iTrader: (15)	Just got this code today with p0303, and p29cf. I'm also on cobb v3
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08-20-2015, 09:23 PM	#18
alexg212 Second Lieutenant 53 Rep 278 Posts Drives: 335is Coupe/Mustang Gt Join Date: Oct 2013 Location: DFW iTrader: (0)	I had this with my cobb tune, but with some hesitation sometimes. A new lpfp sensor resolved it.
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