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M4 2D Convertible
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Repair and Diagnosis (Single Page)
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Self Diagnosis - Diagnostic Trouble Codes (S55)
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Fault Code Tests
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DTC U0078: BMW DTC Cd8420; DME -- Control Module Communication Bus 'F' Off
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Condition for fault memory entry
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Condition for fault memory entry
The fault is logged after Terminal 15 has been hot for a maximum of ten seconds.