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Thread: N54 Fault Code List

              
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    N54 Fault Code List

    Here is a list of ECU codes put together by N54Tech users. Codes that come from non-ECU modules are not listed here and generally not related to modifications, so take your car to the dealer for those.

    3100:
    3100 boost-pressure control, deactivation
    EXPLANATION: This code is triggered any time you experience a reduced boost mode.
    FIX: This code itself is meaningless and serves only to let you know a 'limp mode' took place.

    2F6C:
    2F6C Exhaust fumeflap, input signal
    EXPLANATION: Unplugging actuator valve in trunk for added exhaust noise.
    FIX: Plug back in and clear code. Code will not appear if you disconnect and plug the vacuum line on the exhaust flapper directly.

    2C32:
    2C32 Lambda probe in front of catalytic converter 2, trimming control
    EXPLANATION: ECU software is not compatible with o2 ****.
    FIX: Currently no solution other than reinstalling your factory cats. You may also delete codes when they appear and live with the problem.

    2DEC:
    2DEC Power management, battery control
    EXPLANATION: Sometimes appears when removing battery cable
    FIX: Reconnect battery, clear and rescan

    2D18:
    2D18 manipulation cover, maximum air mass
    EXPLANATION: Tuner detection code
    FIX: Delete before service!

    2D25C:
    2D25 Mass Air Flow Excessive - External Tuning Box Detected
    EXPLANATION: Tuner detection code
    FIX: Delete before service!

    2D1C
    2D1C Accelerator pedal module, pedal sensor signal 2
    EXPLANATION: Gas pedal sensor or wiring issue
    FIX:

    2FBF:
    2FBF Fuel Pressure at Injection Release
    EXPLANATION: Fuel pump pressure code
    FIX: Normally requires fuel pump replacement

    2DED:
    2DED Power management, standby current control
    EXPLANATION: Sometimes appears when disconnecting battery
    FIX: Reconnect battery, clear and rescan

    2D5A
    2D5A Control motor torque limitation
    EXPLANATION: Unknown, but not a detection code. Ignore it.
    FIX:

    29DC:
    29DC Cylinder injection switch-off
    EXPLANATION: Fuel related code
    FIX: Normally requires fuel pump replacement

    2E8D:
    2E8D Intelligent battery sensor, signal transmission
    EXPLANATION: Small cable connected to battery has been removed
    FIX: Reconnect battery, clear and rescan

    2F8F:
    2F8F Accelerator pedal module and brake pedal, plausibility
    EXPLANATION: Can be triggered when doing burn out or dyno
    FIX: Ignore or delete

    29E2:
    29E2 Fuel injection rail, pressure sensor signal
    EXPLANATION: Fuel pump code
    FIX: Normally requires fuel pump replacement

    2A80:
    2A80 Inlet-Vanos variable cam control test, input signal
    EXPLANATION: The VANOS system has proven to be unreliable. Common issue.
    FIX: Requires dealer service, not related to tuning

    2A85:
    2A85 Outlet-VANOS variable cam control test
    EXPLANATION: The VANOS system has proven to be unreliable. Common issue.
    FIX: Requires dealer service, not related to tuning

    2D58:
    2D58 DME digital motor electronics, internal failure: control nominal torque?
    EXPLANATION: Not a tuner detection code
    FIX: Delete or ignore

    2A9A:
    2A9A Camshaft sensor inlet, signal
    Error will cause a warning light
    EXPLANATION:
    FIX:

    2ABC:
    2ABC Charging pressure sensor, electrical
    EXPLANATION: ECU lost connection with tune. Unplugging map sensor or tune with ECU awake will cause this. As will various other tuning related problems.
    FIX: Clear code. If it comes back, check tune related wiring and consult with tuner.

    2ABD:
    2ABD Intake pressure sensor, re-running
    EXPLANATION: Map sensor connectivity issue. Often comes up when TMAP is unplugged from charge pipe blowing off.
    FIX: Clear code. If it comes back, check tune related wiring or TMAP sensor.

    2FBE:
    2FBE Fuel pressure after motor stop
    EXPLANATION: Fuel pump code
    FIX: Normally requires fuel pump replacement

    2AAF
    2AAF Fuel Pump Plausibility
    EXPLANATION: Fuel pump check.
    FIX: Very common code stock and modified alike, does not trigger a CEL. Just ignore it.

    2A17
    2A17 DMTL diagnosis module tank leakage, system failure
    EXPLANATION: Vapor escaping gas tank.
    FIX: Dealer it.

    2F0D:
    2F0D Radiator blind, input signal, (GLF)
    EXPLANATION: Something with the cooling system.
    FIX: Dealer it.

    30FE:
    30FE Exhaust fume turbo charger, high pressure side
    EXPLANATION: ECU boost over ECU target
    FIX: Generally related to tuning. If your tune is equipped with lagfix, the first step is to disable it. If problem persists email your tuner for support.

    30FF:
    30FF Exhaust fume turbocharger low side
    EXPLANATION: ECU boost under ECU target
    FIX: Often caused by boost leaks, leaky DVs, broken vacuum lines, etc. Also possibly tuning related. If using a TMAP tune (SSTT/JB+) it may be a sign you need to reduce your boost level, or perform the solenoid bypass.


    30CF:
    30CF Wastegate, input signal
    EXPLANATION: Wastegate physically unplugged.
    FIX: Check wiring. Green and purple wires on JB3.

    30D0:
    30D0 Wastegate 2, input signal
    EXPLANATION: Wastegate physically unplugged.
    FIX: Check wiring. Green and purple wires on JB3.

    30F1 30F2 30F3 30F4 30F5 30F6:
    Glow ignition: cylinder X
    EXPLANATION: Super Knock in cylinder X.
    FIX: Excessive knock retard. Lower boost levels, or run higher octane.

    29F4 29F5:
    29F4 Catalytic converter conversion
    29F5 Catalytic converter conversion 2
    EXPLANATION: Cats removed or damaged.
    FIX: Reinstall or repair cats, it is illegal in the USA to drive without them.
    *** THESE CODES WILL NOT NEGATIVELY IMPACT VEHICLE PERFORMANCE ***
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    I can add one to that list.

    2F71 E-box-fan, input signal

    Apparently I didn't check all the connectors when putting the ECUbox back together...
    Last edited by DavidV; 03-06-2011 at 09:47 AM.
    There are two theories to arguing with women. Neither one works

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    Um, I have the ENTIRE matrix of possible codes the N54/N55 can have, thier descriptions, what will trigger them etc....would you guys like it?
    BMW Master Certified Tech - ///M Specialist & Diesel Specialist
    - '02 BMW 530i/5 speed - 473WHP @ 14 PSI, E85 PTE6262
    - '11 BMW 328i M Sport - Daily Driver & tuned(can't help the mod bug)
    Click here to enlarge

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    I think a lot of members would be really happy if you posted it Click here to enlarge

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    Click here to enlarge Originally Posted by DLV-Engineering Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    Um, I have the ENTIRE matrix of possible codes the N54/N55 can have, thier descriptions, what will trigger them etc....would you guys like it?
    Yes.

    What we really need is to put together a list similar to this for the N55. We have the PDF but an easy reference like this in the N55 section would be great.
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    Yes.

    What we really need is to put together a list similar to this for the N55. We have the PDF but an easy reference like this in the N55 section would be great.
    I have that also, what it does is it goes by DME and vehicle.
    BMW Master Certified Tech - ///M Specialist & Diesel Specialist
    - '02 BMW 530i/5 speed - 473WHP @ 14 PSI, E85 PTE6262
    - '11 BMW 328i M Sport - Daily Driver & tuned(can't help the mod bug)
    Click here to enlarge

  8. #7
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    Click here to enlarge Originally Posted by DLV-Engineering Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    I have that also, what it does is it goes by DME and vehicle.
    Well then, let's do it Click here to enlarge Put it up in the N55 section and let's make it a sticky.
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    Click here to enlarge Originally Posted by DLV-Engineering Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    Um, I have the ENTIRE matrix of possible codes the N54/N55 can have, thier descriptions, what will trigger them etc....would you guys like it?
    Did this ever get posted? I got a bunch of codes that I cannot work out, 2FCA, 2FDB, 2FDA. Does not seam to affect drivability but I'd like to know what they are meaning.

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    Click here to enlarge Originally Posted by WOPALX Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    Did this ever get posted? I got a bunch of codes that I cannot work out, 2FCA, 2FDB, 2FDA. Does not seam to affect drivability but I'd like to know what they are meaning.
    2 minutes on google reveal:
    Current Shadow Fault Codes

    2FCA:

    Error will not cause a warning light
    Error is not currently present
    Test conditions have been completed
    Short circuit or signal interruption



    2FDA:

    Error will not cause a warning light
    Error is not currently present
    Test conditions have been completed
    Short circuit or signal interruption



    2FDB:

    Error will not cause a warning light
    Error is not currently present
    Test conditions have been completed
    Short circuit or signal interruption


    Does that help? looks like you have had a short circuit or closed circuit interruption (disconnect anything lately?) somewhere. Most likely during an install of sorts. You probably know best.
    There are two theories to arguing with women. Neither one works

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    I have that info, what I want to know is where to look i.e. what part is suffering the signal interruption. They are not listed in the Bentley manual either.
    Only got these codes after BMW reprogrammed me for HPFP recently.

    Click here to enlarge Originally Posted by DavidV Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    2 minutes on google reveal:
    Current Shadow Fault Codes

    2FCA:

    Error will not cause a warning light
    Error is not currently present
    Test conditions have been completed
    Short circuit or signal interruption



    2FDA:

    Error will not cause a warning light
    Error is not currently present
    Test conditions have been completed
    Short circuit or signal interruption



    2FDB:

    Error will not cause a warning light
    Error is not currently present
    Test conditions have been completed
    Short circuit or signal interruption


    Does that help? looks like you have had a short circuit or closed circuit interruption (disconnect anything lately?) somewhere. Most likely during an install of sorts. You probably know best.

  12. #11
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    What I found is that everyone complaining about these specific codes had them after a software update concerning indeed the HPFP.
    Maybe the update leaves some loose ends, or the HPFP is actually going south?
    There are two theories to arguing with women. Neither one works

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    Click here to enlarge Originally Posted by WOPALX Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    I have that info, what I want to know is where to look i.e. what part is suffering the signal interruption. They are not listed in the Bentley manual either.
    Only got these codes after BMW reprogrammed me for HPFP recently.
    There is a PDF with the N55 fault codes listed, maybe you already have it. If you need it, I can e-mail it to you.
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    That would be appreciated.

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    Click here to enlarge Originally Posted by WOPALX Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    That would be appreciated.
    No problem, registration e-mail is fine?
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    Yes mate that will work fine.

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    Click here to enlarge Originally Posted by WOPALX Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    Yes mate that will work fine.
    Check your e-mail my Aussie friend.
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    Thanks heaps, I wonder how they correlate with the N54 fault codes?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    There is a PDF with the N55 fault codes listed, maybe you already have it. If you need it, I can e-mail it to you.
    Hi S,

    Looked for it in the N55 couldnt find it, there are not stickies there. Can you mail it to me pls.

    Thanks

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    Click here to enlarge Originally Posted by Bash Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    Hi S,

    Looked for it in the N55 couldnt find it, there are not stickies there. Can you mail it to me pls.

    Thanks
    Just sticky'd it in the N55 section.

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    I found this great link with code descriptions for the not-so-common fault codes.

    http://www.peakeresearch.com/manuals...201.0%20NA.pdf

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    6 out of 6 members liked this post. Reputation: Yes | No

    N54 Diagnostic Fault Tree

    It recently came to my attention that some members have been troubleshooting certain fuel system faults and other related issues without knowing BMW has published a diagnostic fault tree to help in the diagnosis of certain issues with the N54. One example is the rechecking of injector calibration values when assessing misfires and rough starts.

    Attached is the most recent version I can find (not as widely disseminated as the previous versions easily found on E90post).

    I hope this can help some people that weren't aware.

    Click here to enlarge

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    Attached Images Attached Images

  23. #22
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    great document, @Sticky, this definitely should be stickied
    Click here to enlarge
    Porsche 997.1/997.2, BMW N54/N55 Performance and Custom COBB Tuning Experts
    Home of the World's Fastest BMW N54s, N55s
    www.protuninggroup.com
    www.protuningfreaks.com

  24. #23
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    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    great document, @Sticky , this definitely should be stickied
    If sticky stickies a sticky is that essentially playing with myself?

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    whatever gets you off i guess lol
    Click here to enlarge
    Porsche 997.1/997.2, BMW N54/N55 Performance and Custom COBB Tuning Experts
    Home of the World's Fastest BMW N54s, N55s
    www.protuninggroup.com
    www.protuningfreaks.com

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    Well now I'm turned on.

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