Need a real answer, nothing else!

Scrippy · 11-11-2014, 07:04 PM

What does the error code 2AAF mean?
1-if you say fuel pump plausabity, I'll shoot you!
2-if you say it's common in stock and tuned 335's, I'll shoot you!
3-if you say it won't trigger a CEL and I should ignore it, ILL KILL YOU!!!!
What SPECIFICALLY is wrong? My Whatsapp says "fuel valve throttle spring....". What is the deal and what is messed up? Is this a case of the wires corroding at the wire harness connect and its a momentary disconnection issue?

mike@x-ph.com · 11-11-2014, 07:08 PM

I would like to help you but im scared that you will not like my answer and shoot me

2AAF means that the car is not getting enough fuel.
A code tells you the end result, not the reason why this is happening.

It could be a million thing ( 3 of these things you already mentioned), but it will be very hard to figure it out without a datalog or going to a mechanic

Scrippy · 11-11-2014, 07:10 PM

Quote:

Originally Posted by mike@x-ph.com

I would like to help you but im scared that you will not like my answer and shoot me

2AAF means that the car is not getting enough fuel.
A code tells you the end result, not the reason why this is happening.

It could be a million thing ( 3 of these things you already mentioned), but it will be very hard to figure it out without a datalog or going to a mechanic

Lol, that's a better description than the millions of dead end threads I've read! Thanx bro, I won't shoot ya. I'm less vague.

Nonecure · 11-11-2014, 07:23 PM

I had that exact same error, and I found it was due to my fuel pumps plausabity.

Scrippy · 11-11-2014, 07:24 PM

Quote:

Originally Posted by Nonecure

I had that exact same error, and I found it was due to my fuel pumps plausabity.

ð« that's supposed to be a gun!

Nonecure · 11-11-2014, 07:25 PM

Sorry, I couldn't help myself.

I actually did have that error a while back, cleared it and never saw it again.

Scrippy · 11-11-2014, 07:30 PM

Quote:

Originally Posted by Nonecure

Sorry, I couldn't help myself.

I actually did have that error a while back, cleared it and never saw it again.

Mine is always there, even if I clear it!

C.Pop · 11-11-2014, 08:08 PM

It's my (admittedly limited) understanding from the data given during the code, that it occurs when fuel demand is outside the parameters that the ECU was programmed to accept as "ok". This isn't uncommon on a tuned car because we use WAY more fuel at wide open throttle (especially with aggressive boost curves way down low) so the difference between actual and requested fuel pressure can sometimes be significant.

If that same pressure difference (between actual and requested) were to occur on an otherwise stock car, it would raise eyebrows and likely mean that your fuel pump was either broken or on the way out. Hence, "fuel pump plausibility".

So to me it's more a transient condition fault that is less meaningful because we're operating so far out of the range of stock values.

Scrippy · 11-11-2014, 08:32 PM

Quote:

Originally Posted by C.Pop

It's my (admittedly limited) understanding from the data given during the code, that it occurs when fuel demand is outside the parameters that the ECU was programmed to accept as "ok". This isn't uncommon on a tuned car because we use WAY more fuel at wide open throttle (especially with aggressive boost curves way down low) so the difference between actual and requested fuel pressure can sometimes be significant.

If that same pressure difference (between actual and requested) were to occur on an otherwise stock car, it would raise eyebrows and likely mean that your fuel pump was either broken or on the way out. Hence, "fuel pump plausibility".

So to me it's more a transient condition fault that is less meaningful because we're operating so far out of the range of stock values.

Great answer sir! Thank you!

Scrippy · 11-11-2014, 08:33 PM

Last question.....who makes a good upgraded pump?

Kienvu14 · 11-11-2014, 08:35 PM

Quote:

Originally Posted by Scrippy

Last question.....who makes a good upgraded pump?

Look up Steveaz and his kits!

Ingeniator · 11-11-2014, 08:41 PM

Quote:

Originally Posted by Scrippy

Last question.....who makes a good upgraded pump?

FUEL-IT are the only ones worth getting. The Stg 2 bucket is good for FBO to maxed out hpfp. Once you go shotgun or port fueling you'll need a further upgrade.

@SteveAZ

shawntech · 11-11-2014, 09:27 PM

I get this intermittently around 6000rpm, dci/tune only... afrs do not deviate and bmw sib states if this fault isnt accompanied with other fuel related faults its an over sensitive find and a non issue. That has been the case for me.

SteveAZ · 11-11-2014, 10:29 PM

Please realize that any additional demand placed on the EKP (what runs the LPFP) is likely to cause a 2aaf error. It is a shadow code and does not cause an SES or half engine light but it is the DME warning you that your LPFP is operating outside it's factory tolerances. Consequently it thinks your pump is going bad.

Some people code this out but it is one of the nuances of requiring more fuel.

If you are making more power and/or running ethanol and requiring adjustments to your scalars...you are running more fuel and you will likely get a 2aaf error.

BQTuning · 11-11-2014, 11:09 PM

Quote:

Originally Posted by SteveAZ

If you are making more power and/or running ethanol and requiring adjustments to your scalars...you are running more fuel and you will likely get a 2aaf error.

Bingo !

Btw your stage 2 was beyond my expectations. I feel like a wild animal that got released out of its cage gone wild.....lol

HeavyMetalRocker · 11-12-2014, 08:43 AM

Quote:

Originally Posted by SteveAZ

Please realize that any additional demand placed on the EKP (what runs the LPFP) is likely to cause a 2aaf error. It is a shadow code and does not cause an SES or half engine light but it is the DME warning you that your LPFP is operating outside it's factory tolerances. Consequently it thinks your pump is going bad.

Some people code this out but it is one of the nuances of requiring more fuel.

If you are making more power and/or running ethanol and requiring adjustments to your scalars...you are running more fuel and you will likely get a 2aaf error.

Buy that man a beer!

SteveAZ · 11-15-2014, 11:15 AM

Quote:

Originally Posted by HeavyMetalRocker

Buy that man a beer!

Came across the TSB

Scrippy · 11-15-2014, 11:40 AM

Quote:

Originally Posted by SteveAZ

Quote:

Originally Posted by HeavyMetalRocker

Buy that man a beer!

Came across the TSB

Amazing! Thanks for that bud!

jayzF30 · 11-15-2014, 12:54 PM

Fuel pump plausability, it's common in stock and tuned 335's, it won't trigger a CEL and you should ignore it.

Scrippy · 11-15-2014, 01:07 PM

Quote:

Originally Posted by jazze90

Fuel pump plausability, it's common in stock and tuned 335's, it won't trigger a CEL and you should ignore it.

Omg!

jayzF30 · 11-15-2014, 01:18 PM

Really?

Scrippy · 11-15-2014, 01:24 PM

Quote:

Originally Posted by jazze90

Really?

LMFAO! Good one bro! I feel like this was a setup?!

11-11-2014, 07:04 PM	#1
Scrippy Lord Scrip 1815 Rep 3,013 Posts Drives: 2011 M3 Coupe Join Date: Jan 2012 Location: LA,Ca iTrader: (0) Garage List [0.00] 2007 BMW 335i [0.00]	What does the error code 2AAF mean? 1-if you say fuel pump plausabity, I'll shoot you! 2-if you say it's common in stock and tuned 335's, I'll shoot you! 3-if you say it won't trigger a CEL and I should ignore it, ILL KILL YOU!!!! What SPECIFICALLY is wrong? My Whatsapp says "fuel valve throttle spring....". What is the deal and what is messed up? Is this a case of the wires corroding at the wire harness connect and its a momentary disconnection issue? __________________
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11-11-2014, 07:08 PM	#2
mike@x-ph.com BimmerPost Supporting Vendor 24199 Rep 190,807 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	I would like to help you but im scared that you will not like my answer and shoot me 2AAF means that the car is not getting enough fuel. A code tells you the end result, not the reason why this is happening. It could be a million thing ( 3 of these things you already mentioned), but it will be very hard to figure it out without a datalog or going to a mechanic __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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11-11-2014, 07:23 PM	#4
Nonecure Lieutenant 77 Rep 466 Posts Drives: 2013 M3 Join Date: Nov 2012 Location: Cincinnati, Ohio iTrader: (1)	I had that exact same error, and I found it was due to my fuel pumps plausabity.
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11-11-2014, 07:25 PM	#6
Nonecure Lieutenant 77 Rep 466 Posts Drives: 2013 M3 Join Date: Nov 2012 Location: Cincinnati, Ohio iTrader: (1)	Sorry, I couldn't help myself. I actually did have that error a while back, cleared it and never saw it again.
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11-11-2014, 08:08 PM	#8
C.Pop First Lieutenant 65 Rep 385 Posts Drives: 335i Join Date: May 2013 Location: AZ iTrader: (0)	It's my (admittedly limited) understanding from the data given during the code, that it occurs when fuel demand is outside the parameters that the ECU was programmed to accept as "ok". This isn't uncommon on a tuned car because we use WAY more fuel at wide open throttle (especially with aggressive boost curves way down low) so the difference between actual and requested fuel pressure can sometimes be significant. If that same pressure difference (between actual and requested) were to occur on an otherwise stock car, it would raise eyebrows and likely mean that your fuel pump was either broken or on the way out. Hence, "fuel pump plausibility". So to me it's more a transient condition fault that is less meaningful because we're operating so far out of the range of stock values. __________________ 2007 E90, 6MT, VRSF 7" FMIC, RR DP's, Vargas Stage 2+ (19t unclipped), CP-e Charge Pipe/Tial BOV, BMS DCI, Fuel-it! Stg 2 LPFP, E66, 118k+ miles Brentuned
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11-11-2014, 08:33 PM	#10
Scrippy Lord Scrip 1815 Rep 3,013 Posts Drives: 2011 M3 Coupe Join Date: Jan 2012 Location: LA,Ca iTrader: (0) Garage List [0.00] 2007 BMW 335i [0.00]	Last question.....who makes a good upgraded pump? __________________
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11-11-2014, 09:27 PM	#13
shawntech The Wolf 247 Rep 987 Posts Drives: stuff Join Date: Oct 2013 Location: Midwest iTrader: (0) Garage List [0.00] 2019 BMW M850i conv ... [0.00]	I get this intermittently around 6000rpm, dci/tune only... afrs do not deviate and bmw sib states if this fault isnt accompanied with other fuel related faults its an over sensitive find and a non issue. That has been the case for me.
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11-11-2014, 10:29 PM	#14
SteveAZ Captain 60 Rep 654 Posts Drives: 135i Cab Join Date: Jul 2012 Location: Phoenix, AZ iTrader: (5)	Please realize that any additional demand placed on the EKP (what runs the LPFP) is likely to cause a 2aaf error. It is a shadow code and does not cause an SES or half engine light but it is the DME warning you that your LPFP is operating outside it's factory tolerances. Consequently it thinks your pump is going bad. Some people code this out but it is one of the nuances of requiring more fuel. If you are making more power and/or running ethanol and requiring adjustments to your scalars...you are running more fuel and you will likely get a 2aaf error. __________________ 2008 E88--Fuel-It! Stage 4 LPFP & PI--PS2 turbos--JB4/MHD--FBO--662whp/604wtq 2011 E90--Fuel-It! S2BL LPFP and PI--PS2 Turbo--JB4/MHD--FBO--546whp/589wtq 2013 Mini JCW--Tune--DP--FMIC--a couple Fuel-It! goodies--265whp/320wtq 2013 F10--JB4/BM3 2015 F82--Fuel-It! Stage 3 LPFP & PI--PS2 Turbos-- JB4/BM3-FBO
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11-15-2014, 12:54 PM	#19
jayzF30 Captain 34 Rep 783 Posts Drives: '07 335i, '09 M3 Join Date: Mar 2012 Location: Thornhill iTrader: (0)	Fuel pump plausability, it's common in stock and tuned 335's, it won't trigger a CEL and you should ignore it. __________________ '07 335i E90 - PTF ProTUNED by Dzenno - COBB FMIC - AFE DCI - AA DPs - HFS4 Meth '09 M3 - Stock
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11-15-2014, 01:18 PM	#21
jayzF30 Captain 34 Rep 783 Posts Drives: '07 335i, '09 M3 Join Date: Mar 2012 Location: Thornhill iTrader: (0)	Really? Attached Images __________________ '07 335i E90 - PTF ProTUNED by Dzenno - COBB FMIC - AFE DCI - AA DPs - HFS4 Meth '09 M3 - Stock
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