Coding Higher Voltage Limit to Avoid 2AAE Fuel Pump Error Code

jts1981

Private
Jan 29, 2018
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NYC
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Z4
It seems that just doing this coding will work out fine. How much can the stock ekp take, 24a? I'm running a walbro 525 pump now and I think thats what it needs.
 

langsbr

Captain
Apr 5, 2017
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07 335i 6MT e90
So is the consensus that this code is a non issue and can be eliminated by changing the coding or is it indicative of an issue? I get it quite a bit after a WOT pull, and figured it was just a 'normal' error that could be cleared and ignored. I only have a PR Stage 2 pump. Could it be that my EKP is weak or dying?
 

9krpmrx8

Lieutenant
Nov 5, 2016
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San Antonio, Texas
It's normal, or at least common when people upgrade to the Walbro 450. Coding it fixed it for me, my coder (N54 owner) was skeptical and thought for sure my EKP was bad but I have not had any issues since he coded it. I am N55 so no LP sensor but I will be installing one in a replacement fuel line and a FP gauge as soon as I find the time.
 
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JBacon335

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Nov 7, 2016
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Toms River, NJ
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07 335i Sedan, 1988 Mustang GT
Anyone try playing with different characteristic curves with an upgraded pump? Was wondering if one might have less pressure fluctuations than another
 

mevlanN54

New Member
Mar 27, 2021
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Macedonia 🇲🇰
I get that 2AAE “fuel pump plausibility” code in the summer time almost always immediately after clearing codes and driving a minute. I’m running the original Fuel-It Stage 2 LPFP upgraded pump which I believe is a Walbro 450. I have an EKPM3. (I haven’t gotten that code lately now that it’s cold in Philly.)
where can i buy it
 

I am Jacks N54

Specialist
Sep 10, 2018
81
1
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Ventura, CA
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e90 335i
I installed an EKPM3 from eBay and coded it with ProTool. Seemed to solve the voltage issue until earlier today when the car wouldn't start back up. Got the lift light on the dash and an LPFP code. Cleared the codes, swapped back in the EKPM2 (I luckily kept in the car), and it fired right back up.

I'm thinking bad EKPM3, but would appreciate additional theories before I move forward. 🍻
 

I am Jacks N54

Specialist
Sep 10, 2018
81
1
52
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Ventura, CA
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e90 335i
Yes @Mzfhartge, the second one was also from eBay. It's hit or miss.

FWIW, the new module is an EKPM3 with `FSV 5.32.97`. The previous one was `FSV 06.00.03`. My thought process was it was manufactured for a closer year (I'm 07 e90), but I could have just gotten a bad module the first try. I'd definitely recommend getting another one before you go down any rabbit holes.
 
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fmorelli

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Staff member
Aug 11, 2017
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Ok let's see if we can get this nailed down with others:
  • I have not seen anything that indicates that the EKP's will not work across various cars and versions of EKP.
  • From what I understand coding is ONLY required if you are moving from EKPM2 to EKPM3 (and the other way)? And this may not be the case (someone say otherwise).
  • If coding for same version, largely done so VIN in the module matches, and BMW software portal updates can be performed properly.
Maybe @martymil or others have input on the above.
 
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martymil

Major General
Sep 6, 2017
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never seen this before, would have loved to play with it to figure it out but on the other side of the world.

its working now maybe a dead ekp, stranger things have happen.
 

turbohugh

Specialist
Nov 13, 2018
53
11
0
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E92 335
I use proTool on my tablet. If you install a FTP program like CX-explorer, you can drag the files off the tablet, follow the script in the youtube video about modifying the .trc files and changing the checksum, and then drag it back via FTP to the tablet, and use Pro-tool to push the .trc file to the module.
The FTP portion also makes it easier when Im dragging logs from my tablet and uploading to datazap or something.