Mercedes Benz

Mercedes-Benz Mercedes Benz OEM Parts Mercedes Benz OE Replacement Parts 0443 Heating of component G3/4 (Right O2 sensor, before TWC [KAT]) : Open circuit (P0030) Possible cause: - G3/4 (Right O2 sensor, before TWC [KAT]) - Voltage supply via component Z7/36 (Circuit 87 M2e connector sleeve) Affected functions: - Engine diagnosis - Exhaust system ------------------------------------------------- Test 1: Power supply Test 2: Check component G3/4 (Right O2 sensor, before TWC [KAT]). Test 3: Check component G3/4 (Right O2 sensor, before TWC [KAT]). 1. Power supply Voltage supply via component Z7/36 (Circuit 87 M2e connector sleeve) Possible cause and remedy - Check voltage supply according to wiring diagram. 2. Check component G3/4 (Right O2 sensor, before TWC [KAT]). Warning!Communication with ECU required. 3. Check component G3/4 (Right O2 sensor, before TWC [KAT]). Warning!Communication with ECU required.