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General E46 Forum
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Old 05-31-2011, 11:18 AM   #1
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OBC's MPG not working, worth fixing?--Solved

The MPG indicator on the OBC of my 2002 325 has been stuck at 21.1 for about a week or two. All other functions work. It has been reset to Zero, but comes back to 21.1 mpg.
Is there an easy fix or does the total computer have to be reset?

Wife thought that resetting the mileage was same as resetting the OBC's MPG. I reset the MPG, and it seems to be working now.

Last edited by Flycaster; 05-31-2011 at 02:16 PM.
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Old 05-31-2011, 11:22 AM   #2
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Does it go back to 21.1 right away after you zero it?
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Old 05-31-2011, 11:30 AM   #3
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Don't know. This is what wife said. in a couple of hours I'll be able to test it myself and then report back.
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Old 05-31-2011, 11:47 AM   #4
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Disconnect the battery for five min and see if it does anything.
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Old 05-31-2011, 12:52 PM   #5
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Stuck? What if you're getting 21.1 mpg? Then it's reporting correctly, and is not stuck at all.
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Old 05-31-2011, 01:14 PM   #6
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