2008 r56 Base non turbo limp mode issue

Discussion in '2nd Generation: 2007+ R55 through R61' started by Jmshlbrt, Sep 13, 2019.

  1. Jmshlbrt

    Jmshlbrt New Member

    Sep 13, 2019
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    I have a 2008 Mini that started running bad with p0300, p0304 I changed the plugs and coils but the limp mode light will not reset...please help I have checked everything and no code are showing.
     
  2. MCS02

    MCS02 Moderator
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    Welcome to MA! Did you do a reset with your code reader and it did not reset?
     
  3. Jmshlbrt

    Jmshlbrt New Member

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    I've tried to but to no avail, I also unplugged battery over night and nothing
     
  4. 00Mini

    00Mini Well-Known Member

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    I just watched a YouTube video on this very issue and mechanic was using a code reader that would not reset codes so he went to another one that used an iPhone and it was able to do the job and Welcome to Motoring Alliance.
     
  5. Jmshlbrt

    Jmshlbrt New Member

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  6. Crashton

    Crashton Club Coordinator

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    #6 Crashton, Sep 13, 2019
    Last edited: Sep 14, 2019
    Welcome to M/A.

    There are some proprietary codes that a standard code reader can not pick up. You may need a reader that will read those. Otherwise you'll be chasing your tail.

    Someone please tell this person what that reader is. I can't remember which one it is.
     
  7. Jmshlbrt

    Jmshlbrt New Member

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    I'll see if I can find one
     
  8. MCS02

    MCS02 Moderator
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    This is the one I have. I don't really like doing business with ECS. You may find it on Amazon also

    https://www.ecstuning.com/b-schwaben-by-foxwell-parts/professional-bmw-mini-scan-tool/014020sch01a~scf/

    Some have used one that uses your iPhone that does all the BMW/MINI codes I think the name is iCarly.

    P0300 is miss fire cylinder misfire several cylinders. P0304 could be a fuel injector on cylinder 4.

    https://www.motoringalliance.com/articles/ecu-codes-chart-2nd-generation-mini.57/

    If it has a miss at idle you could disconnect the coil pack for that cylinder and see if it stays the same. If it doesn't get worse I would check the number 4 injector. Maybe move it to another cylinder and see if it fallows it.

    I know you have checked everything but make very sure all the plugs are plugged in correctly and there is no corrosion. Check the vacuum lines for cracks and that they are all plugged in, some can be hard to see and get at.

    Let us know what you find. Hopefully some of our Gen2 guys will be along to help. I am a Gen1 guy with Gen 2 leanings,Ha.
     
  9. Jmshlbrt

    Jmshlbrt New Member

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    This is what is so confusing, in limp mode I can drive it with no misfire or anything, I can manually shift it and get to 65 mph, but it just won't come out of limp mode. Run great
     
  10. MCS02

    MCS02 Moderator
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    And you have the half motor symbol on the dash?
     
  11. Jmshlbrt

    Jmshlbrt New Member

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    Yes that is how I know it is in limp mode, but the cars running fine.
     
  12. MCS02

    MCS02 Moderator
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    Just to make sure I understand. The codes reset and did not come back but you are still in limp mode.

    if that’s the case all I can think of is you still have codes your reader can’t see and or can’t reset. I looked at a clubman yesterday for my mother-in-law. The guy told me he had replaced the front bumper, hood and AC radiator, the previous owner hit a dear. Anyway it is a very nice car he said it had no codes and I could take it to a mechanic for a pre buy. I hooked up my Cade reader and found a ton of codes. He couldn’t believe it. Most of them were there because of the worked he did. So I cleared them and drove it none of the codes came back.
    So right now I think you May need a better reader or take it to a shop that works on Minis and give them $100 to check the codes. If your keeping the car I would get a good reader first. Heck the gen 2 Mini have to have the battery registered to the car when you replace it. Everyone here wanted $100 to do it. After a new battery for my wife’s R57 and my R58 the reader has paid for its self
     
  13. MCS02

    MCS02 Moderator
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    Just a thought. It may be in limp mode because the #4 injector is not delivering enough fuel for higher speeds without going to lean on that cylinder. This could be why it is staying in limp mode
     
  14. Jmshlbrt

    Jmshlbrt New Member

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    That's what I was trying to avoid, there are no Mini places here except 3 hrs away, the BMW place said they don't usually work on them and they are an hour away. But I'll look into a different code reader for Mini's
     
  15. Jmshlbrt

    Jmshlbrt New Member

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    I can drive it manually shift and build rpms to 4000 but just really slowly, but it doesn't seem to hesitate or anything
     
  16. MCS02

    MCS02 Moderator
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    It may be leaning out so the limp mode is trying to keep your revs low to avoid damage to the engine. This is just a guess. You could drive it around for a few miles then pull the plugs and take a look at them if one (and sense the #4 is suspect) is chalky white compared to the others then you know one cylinder is too lean. for that matter if one is darker than the otters it is too rich. I bad injector could cause ether.
     
  17. Jmshlbrt

    Jmshlbrt New Member

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    Wouldn't that set a code
     
  18. MCS02

    MCS02 Moderator
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    Yes if your reader can read it. P0304 is an injector code. But it may be possible that your reader just didn’t clear everything. I am just making a guess from the codes you gave.
     
  19. Jmshlbrt

    Jmshlbrt New Member

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    Ok here's the update;

    I have it read with a new reader and I get codes 2B4E dme, 2B4B dme these have to do with the gas pedal sensor I guess. I also checked the misfire issue with this new machine and it shows it misfire when not using the throttle. ie at idle but not all the time. any ideas where to go from here?
     
  20. MCS02

    MCS02 Moderator
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    Well the only thing I can find is this over at Mini2

    https://www.mini2.com/threads/no-throttle-response-after-timing-chain.353423/

    I am sorry But this one has me. It could be a bad throttle peddle but I can't be sure of that. They really don't go out very often.

    I would make sure every thing is plugged in good and all the plugs are in good shape. Like it says on MINI2 check your throttle body is plugged in well.

    Sorry I cant be more help. Let us know what you find.
     

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