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I read your post again. You're getting a CEL and a DTC? That's not indicative of low urea level at all. Ard and I are speaking of the Low DEF "No Start in 999 Miles" warning that comes on in the instrument cluster and on the iDrive display. The P203/04BAC DTCs specifically concerns the reductant level detection system for the active tank which means there could an issue with the level sensors.
BMW NA extended the warranty on the active tank under SI B 01-23-16 to 10 years/120,000 miles. There is also an extended warranty for several other NOx reduction system components.
I had them all replaced in 2016 when I got the 04BAC DTC and it could not be cleared due to the level sensors in the active tank being faulty.
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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim
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01-15-2019, 04:28 AM
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