Check engine light on, and limp mode. - BMW F800 Riders Forum & Registry



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  1. #1
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    Hi all,
    I hope you're all well.

    My 2006 F800s has the warning triangle and flashing engine light on. It's obviously in limp mode as i'm hitting a rev limiter at around 4.5k rpm.
    I took it to my local indi mechanic (very good man) and he plugged in his diagnostic computer. The fault that came up is 'Minimum on right live axle'.
    Neither of us have a clue about what that can be!
    Has anyone experienced this before?
    Could it be the tps, referring to the axle through the throttle body?
    There is nothing obviously wrong with the bike. It starts, idles, and rides perfectly until the rev limiter cuts in.
    Thanks,
    Rich

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    I would use one of the BMW Motorrad-specific diagnostic tools (like a GS-911) to dump the code.
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  4. #3
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    you want the specific error code, as this will relate more to what the bike is seeing as the problem.

    Was the bike working fine before and this jsut happened over night? or did it happen whilst out riding?
    BMW F800ST, 2010, Black, Fuzeblock, Sat Nav, BMW Tank Bag, Givi Touring Screen, Denali Spotlights, Denali CANSmart, Wunderlich Crash Bars, 62K Miles & counting 

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  6. #4
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    Quote Originally Posted by DJ123 View Post
    you want the specific error code, as this will relate more to what the bike is seeing as the problem.

    Was the bike working fine before and this jsut happened over night? or did it happen whilst out riding?
    It happened while riding.
    I didn't, and haven't, noticed anything while riding, other than the rev limiting.

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    Quote Originally Posted by richyrich View Post
    The fault that came up is 'Minimum on right live axle'.
    Hey Rich,

    Very odd description. I am going to suggest that the diagnostic is showing incorrect text (but underlying probably seeing the correct code). Use a motoscan or a GS-911 to get the proper details.

    Thinking about your symptoms, this is likely a sensor that has gone bad (tps, cam shaft position sensor..etc).
    Claudio
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    Where in East Anglia are you based?
    I have access to Motorscan for reading codes.
    Away at the moment, back next week -- based near Peterborough.
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  9. #7
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    Quote Originally Posted by richyrich View Post
    It happened while riding.
    I didn't, and haven't, noticed anything while riding, other than the rev limiting.
    Disconnect the battery for 10 minutes, re-connect and see if the fault is still there. If not go for a ride and see if it comes back. That'll tell whether it's a true fault, or a glitch that happened that caused the bike to go into limp mode.
    BMW F800ST, 2010, Black, Fuzeblock, Sat Nav, BMW Tank Bag, Givi Touring Screen, Denali Spotlights, Denali CANSmart, Wunderlich Crash Bars, 62K Miles & counting 

  10. #8
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    Quote Originally Posted by Claudio_S View Post
    Hey Rich,

    Very odd description. I am going to suggest that the diagnostic is showing incorrect text (but underlying probably seeing the correct code). Use a motoscan or a GS-911 to get the proper details.

    Thinking about your symptoms, this is likely a sensor that has gone bad (tps, cam shaft position sensor..etc).

    Cheers.
    That's what I was thinking. I'll get some time at the end of this week, so will check out the sensors and connectors.

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    Quote Originally Posted by Bogbody View Post
    Where in East Anglia are you based?
    I have access to Motorscan for reading codes.
    Away at the moment, back next week -- based near Peterborough.
    Thanks for this.
    I'm all the way over near Lowestoft though

  12. #10
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    Quote Originally Posted by DJ123 View Post
    Disconnect the battery for 10 minutes, re-connect and see if the fault is still there. If not go for a ride and see if it comes back. That'll tell whether it's a true fault, or a glitch that happened that caused the bike to go into limp mode.
    I had the battery out for a few days as I was waiting for a new one to arrive.
    The mechanic cleared the code but it returned instantly, so it's definitely a fault that needs tracing/

  13. #11
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    Lowestoft? Over 2 hours ride from here alas. Its likely that you'll need to invest in Motoscan.
    Its best to get their obd dongle 'cos its gaurenteed to work.
    Set you back about £50 for the dongle and about the same for a full licence and adapter lead.
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    Quote Originally Posted by richyrich View Post
    I had the battery out for a few days as I was waiting for a new one to arrive.
    The mechanic cleared the code but it returned instantly, so it's definitely a fault that needs tracing/
    Hopefully it is nothing too serious, and only a sensor or something small/easy to change.
    BMW F800ST, 2010, Black, Fuzeblock, Sat Nav, BMW Tank Bag, Givi Touring Screen, Denali Spotlights, Denali CANSmart, Wunderlich Crash Bars, 62K Miles & counting 

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    Quote Originally Posted by richyrich View Post
    I had the battery out for a few days as I was waiting for a new one to arrive.
    The mechanic cleared the code but it returned instantly, so it's definitely a fault that needs tracing/
    Do you have a code number for the fault?
    If its emission related a universal code reader might give you a number you could research/google ??
    F800GT in blue known as "The Blue Bat"
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  16. #14
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    Quote Originally Posted by Bogbody View Post
    Lowestoft? Over 2 hours ride from here alas. Its likely that you'll need to invest in Motoscan.
    Its best to get their obd dongle 'cos its gaurenteed to work.
    Set you back about £50 for the dongle and about the same for a full licence and adapter lead.
    If I was keeping it I definitely would. I'm wanting this sorted so I can MOT it, so I can sell it.

  17. #15
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    Quote Originally Posted by DJ123 View Post
    Hopefully it is nothing too serious, and only a sensor or something small/easy to change.
    I'm crossing everything for that outcome too!

  18. #16
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    Quote Originally Posted by Bogbody View Post
    Do you have a code number for the fault?
    If its emission related a universal code reader might give you a number you could research/google ??
    Click image for larger version. 

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    This is a photo of the reader screen. I don't know what reader he has, but it was a very comprehensive one.

  19. #17
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    I could be wrong, but that looks like a normal OBD2 readout, what you need is something that can read and log sensor values directly, that's going to be a dealer computer, a GS911 or maybe the motoscan app.

  20. #18
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    Quote Originally Posted by richyrich View Post
    Click image for larger version. 

Name:	119735082_321005449195588_4883130275642756227_n.jpg 
Views:	108 
Size:	17.7 KB 
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    This is a photo of the reader screen. I don't know what reader he has, but it was a very comprehensive one.
    it needs to be BMW specific/compatible to get the codes.
    BMW F800ST, 2010, Black, Fuzeblock, Sat Nav, BMW Tank Bag, Givi Touring Screen, Denali Spotlights, Denali CANSmart, Wunderlich Crash Bars, 62K Miles & counting 

  21. #19
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    Quote Originally Posted by richyrich View Post
    Click image for larger version. 

Name:	119735082_321005449195588_4883130275642756227_n.jpg 
Views:	108 
Size:	17.7 KB 
ID:	368571
    This is a photo of the reader screen. I don't know what reader he has, but it was a very comprehensive one.
    Agreed - does not make a lot of sense.
    Best I would suggest is to check the battery charging voltage and for damaged wiring around the throttle position sensor.
    Now .... it looks like the mechs dongle is bluetooth??
    Try connecting the free motoscan app to it and see if you can get it to read a code ?????
    F800GT in blue known as "The Blue Bat"
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  22. #20
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    Thanks all. Good advice!
    I'll get on it this weekend.

  23. #21
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    Quote Originally Posted by richyrich View Post
    Thanks all. Good advice!
    I'll get on it this weekend.
    This post may be relevant?

    https://f800riders.org/forum/showthr...and-stuttering
    F800GT in blue known as "The Blue Bat"
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  24. #22
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    Cheers buddy.
    I'll give that a thorough read through at the weekend.

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    It sounds like its an error in your F800. I think there might be a problem with your axle. Have you asked your mechanic to check each component of your bike?

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    Not every person is a vehicle master, and it tends to be quite terrifying when your vehicle begins acting bizarre for no evident explanation. One such event would be when limp mode initiates, if your vehicle out of nowhere eased back down, and the 'check motor light' went ahead, you would get stressed and potentially confounded. Well don't stress, we have ordered all the data you need on limp mode so you can plan yourself and expertise to deal with it.

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    Bots are getting more and more interesting. They've been contextual lately.

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  30. #26
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    Problem solved!!!

    I managed to get the bike to an independent BMW garage a few weeks ago. He put it on the proper GS911 reader and it came back with two errors;
    1 - voltage too high, so needed to replace the reg/rec.
    2 - IAV values not registering, so needed investigating.

    I've replaced the reg/rec. Very easy job. And the running/charging voltage is back to normal.
    Today (work gets in the way of bike stuff!) I got the air box off and checked the IAV. The very first thing I noticed was that the electrical plug was disconnected! I'm guessing I hadn't fully clipped it back in after a previous service. Whilst there I checked the hoses etc and everything else looked fine. It's funny that with a completely inactive IAV the engine idle was absolutely fine.
    Once back together I gave it a run out. The idle is perfect but there's still a stutter at about 4k revs. The Check Engine light has gone out though.
    Is there a period of 're-learning' for the ecu? Should I just put some miles on it and see how it goes?
    Although the IAV hoses looked fine, would them collapsing at higher revs cause this stuttering? I'm happy to change them as it's a very easy job. I probably will anyway.
    Thanks all.

  31. #27
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    Thanks for updating.

    Hope you get the stutter sorted.
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  32. #28
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    Easier to reset the learned adaptations and start from scratch then relearn from a bad map. Both gs911 sand motoscan can do this.

  33. #29
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    When were the plugs changed last?
    Perhaps an air filter is also due?
    Ride it for a bit and see what happens.
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  34. #30
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    Quote Originally Posted by rcb78 View Post
    Easier to reset the learned adaptations and start from scratch then relearn from a bad map. Both gs911 sand motoscan can do this.

    Cool. If it persists after the new hoses are fitted I'll get it booked in.
    Thank you.

  35. #31
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    Quote Originally Posted by Bogbody View Post
    When were the plugs changed last?
    Perhaps an air filter is also due?
    Ride it for a bit and see what happens.
    Plugs and air filter are both good. It was a consideration so I've checked this morning.
    I'll change the IAV hoses later then ride it for a few days and see how it goes.

  36. #32
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    i think at 4k the secondary air valves open, that may be the cause of your stutter if that is the case.

    Again, if you have the motoscan app you can switch these on/off when the bike is at idle and hear if they switch on, or not.
    BMW F800ST, 2010, Black, Fuzeblock, Sat Nav, BMW Tank Bag, Givi Touring Screen, Denali Spotlights, Denali CANSmart, Wunderlich Crash Bars, 62K Miles & counting 

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