Home >> BMW >> 2016 >> 650i 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes - Bank 2 (N63TU) >> Fault Code Tests >> DTC U123C: BMW DTC CDE434; DME -- Message Monitoring Slave-ECM With Master-ECM Interconnection 5 Alive Check >> Service instruction