Mercedes Benz

2010 Mercedes Benz Truck GL 350 BLUETEC (164.825) V6-3.0L DSL Turbo (642.820) Vehicle: All Technical Service Bulletins Engine Controls - Short Circuit O2 Sensor DTC's Stored Short circuit faults concerning oxygen sensor stored in CDI control unit Topic number LI49.20-P-053609 Version 1 Design group 49.20 Exhaust aftertreatment unit Date 04-05-2012 Validity Model 164 with engine 642 and SA code U42 (BlueTEC (SCR) diesel exhaust treatment) Reason for change Complaint: Engine diagnosis warning lamp CEL) lights up The following faults may be stored in the CDI control unit: Fault code 14E300 The output for the heater of oxygen sensor 1 (cylinder bank 1) has an electrical fault or an open circuit Fault code 14E700 Oxygen sensor 1 (cylinder bank 1) has a short circuit to positive Fault code 14E800 Oxygen sensor 1 (cylinder bank 1) has a short circuit to ground Cause: There may be transition resistances in the electrical lines or connectors between N319 (CDI control uni...