M-MPH light remains lit with car turned off, key removed, steering wheel locked

[junkyard_sal]

I noticed something odd after my wife left the interior light on in my MTech Cabrio and drained the battery.

After I revived the battery the m-mph light on the 13 button OBV remained lit when the car was off. Does anyone have any experience with this problem. I reset OBC and everything else seems to be functioning properly.





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[junkyard_sal]

One other piece of information. Since the battery was old and a buddy crashed another vert with a new battery I swapped the battery for the new one but the problem persisted


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[bmwman91]

Weird. That light is only supposed to turn on when you set a speed limit and exceed it, right? (I have never used it so I am guessing) If that is the case then I wonder if the limit got set at zero or something and is reminding you that you went faster than zero.

[AndrewBird]

It turns on when it is set. Try clearing it and see if it turns off.

[junkyard_sal]

According the manual you simply press m-mph to reset it but that has no effect. The light remains lit. I would have thought disconnecting the batter would have cleared it.

[KIRIEIW]

M-MPH light remains lit with car turned off, key removed, steering wheel locked

My Mtech did the same exact thing when I bought the car. I ended up getting a replacement 13 button OBC and it fixed the problem. Exact problem your having, just find a cheap replacement would be my 2 cents.