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Author Message   Ddaleuly Posted on Tuesday, May 12, 2009 - 09:28 pm:        V light comes on after start. ECM Spy shows a trouble code 21 - Active Muffler Control. Installed a Drummer about a month ago (love it!), and just left the servo hooked up w/the cable disconnected. Originally, the servo would work (articulate w/engine speed), but does nothing now. Is this the cause of the light (charging system appears ok), and if so should I have got the servo dummy? Thanks David   Mcdusa1 Posted on Tuesday, June 02, 2009 - 02:32 pm:        check your fuses.   Fahren Posted on Monday, June 08, 2009 - 04:33 pm:        ECMSpy gurus pitch in here: can't you fix this in ecmspy by clicking off the function that reads the servo? But Mcdusa is right - if there's no action at all, check the fuses. But if it is a fuse, you'll have to fix what is blowing the fuse, so disengaging the exhaust servo function in ecmspy would be one way to do it, I believe.   Xcephasx Posted on Thursday, July 30, 2009 - 10:30 pm:        Yes, you can simply "click it off" in ecmspy under diagnostics tab>active muffler control>off. i'm getting the same code on my spec. ops pipe. i'm not sure if it's a bad actuator, or what... anyone else getting this code?

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