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Home >> BMW >> 2014 >> 535d >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes (N47 & N57, Diesel) >> Fault Code Tests >> DTC U1855: BMW DTC CDA66C; DME -- Message Monitoring Operating Mode Drive Motor 'A' Traction Signal Error >> Service instruction

Service instruction

The defect is not in the control unit that records the interface fault. For this reason the control unit should not be replaced.