Mercedes Benz

Mercedes-Benz Mercedes Benz OEM Parts Mercedes Benz OE Replacement Parts 0446 Heating of component G3/3 (Left O2 sensor, before TWC [KAT]) : Short circuit to ground (P0051) Possible cause: - G3/3 (Left O2 sensor, before TWC [KAT]) Affected functions: - Engine diagnosis - Exhaust system ------------------------------------------------- Test 1: Check component G3/3 (Left O2 sensor, before TWC [KAT]). 1. Check component G3/3 (Left O2 sensor, before TWC [KAT]). Warning!Communication with ECU required.