Home >> BMW >> 2012 >> 335i 2D Convertible, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - N55 - Diagnostic Trouble Codes - DTC P0617 (BMW DTC 1F1B40) Through DTC U1128 (BMW DTC CDC304) >> DTC U1185; BMW DTC CD840A: DME/DDE PT-CAN: Communication fault >> Fault code