FWIW, as far as I can tell, CD8B is related to the electric parking brake. The exact translation of those codes varies slightly depending on the model and I suspect the foxwell doesn't handle it.
To go into more depth than you probably care for, here is CD8B for the MSD80 in the E90 (N54 3.0L twin turbo)
Quote:
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0xCD8B Local-CAN Kommunikationsfehler
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> Local-CAN communication error
And here is CD8B for the E70 N55
Quote:
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0xCD8B PT-CAN, Botschaft (Stellanforderung EMF, 0x1A7): Prüfsumme falsch
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>
PT-CAN, message (EMF actuation request, 0x1A7): Checksum wrong
This is the E60 N62
Quote:
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CDKCANB - Local CAN Bus Off
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Unfortunately I don't have the definitions available for the N62TU in the E70 to give you a firm answer on exactly what that code means
