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Old 10-24-2019, 03:33 PM
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wpoll wpoll is offline
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Join Date: Sep 2015
Location: South Island, New Zealand
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P0401 is EGR insufficient flow. I had this code when my exhaust manifold was cracked... not likely to cause a trans limp mode.

BTW, this code suggests to me that you are using a generic code reader. Forget using that to sort your issues - you need something that reads BMW fault codes properly. A laptop with INPA, DIS, ISTA-D, PA-Soft 1.4 or a hardware scanner like a Foxwell and a few others. A generic scanner won't tell you most of the codes...

P.S. please don't post the same question in multiple threads...
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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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