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Thread: CEL 21...cable disconnected

  1. #1
    Senior Member
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    Apr 2012
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    I have the code 21 for my check engine and the code 16. i am replacing the battery today so no worries with that.

    21 is the in active exhaust muffler control. I have a Jardine slip on. I removed the airbox cover to see that wire to the conrol unit has been totally disconnected. The unit still moves clockwise and comes back by itself. is this something i need to hook up or do i need to just clear the code or what?

    And if i can clear the check engine light..how? i do not have ecm spy.

    Thanks for the help

  2. #2
    Senior Member
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    Jun 2008
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    Americansportbike has a whatchamajigger that getss rid of that, its pretty cheap, and u just plug it in

  3. #3

  4. #4
    Senior Member
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    Oh that thing is sweet. it plugs right into the control until of the exaust? or the actual ecu?

  5. #5
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    will it hurt the bike if i dont hook that up? or is it just something to make the enine light turn off?

  6. #6
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    It wont hurt ur bike at all,, other than if you throw a check engine light for something else, you wont notice. This is only for the cel. Yeah it plugs right up to the battery and ecu. I went ahead and wired mine open anyway, just took off the servo, cut the line, ran it through a tiny metal h9ole somewhere under the seat and put a ball on the end so it couldnt retract. I dont know if this is neccesary, but I did it anyways. The whole process to maybe 15 mins

  7. #7
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    what is the servo? and is it always open are always closed? so i would just pull on it hard enough so it is open and then wire it open like that? Sorry for all the ?. new at this buell stuff

  8. #8
    Senior Member
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    Oct 2010
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    Can you turn it off with ECM spy or tunerpro?

  9. #9
    Senior Member
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    Apr 2012
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    I dont have ECM spy and dont really want to build one. I have wiring. So if somone wants to make me one i would be happy to pay ;). and i dont know what tuner pro is

  10. #10
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    The servo is that tiny little motor looking thing that sits underneath your airbox, its has an steel tension wire around a cresent shaped whatchamajig. You can rotate it and it pulls open the exhaust valve, that doesnt exist on your can. I just unhooked the servo, took the wire off, it has a little metal bob at the end like the one at the end of your clutch cable the hooks into your clutch lever.

    ECMSpy is a free software, the cables to connect your bike to your laptop/computer can be made or bought off ebay or other peoples. It basically allows you to reflash your ecm with and a/f ratio you would like. Among other things too I have heard, but as I have an 08 buell I have never used it. By the time they got ecmspy working on the 08 ecm's I had already gotten a servo emulator, and honestly like the way my bike runs. Im sure if I reflashed my ecm i wouuld like it more, but im really not a nut about modding **** to hell.

    Hope all this helps and isnt too overwhelming. Iv been up 22 hours straight as I type this and will be up for another 6 hours at least thanks to the graveyard shift and long layoverr in this fuuuuucking airport... So im a little loopy, maybe someone else can chime in and help make sense of things...



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