Mercedes Benz

2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) A L L  Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts 0549 G3/6 (Right O2 sensor, after TWC [KAT]) : Short circuit to positive / Resistance of sensor heater too low (P0138) Possible cause: - G3/6 (Right O2 sensor, after TWC [KAT]) Affected functions: - Engine diagnosis - Exhaust system ------------------------------------------------   Test 1: Check component G3/6 (Right O2 sensor, after TWC [KAT]). 1. Check component G3/6 (Right O2 sensor, after TWC [KAT]). Warning!Communication with ECU required.