Mercedes Benz

Mercedes-Benz Mercedes Benz OEM Parts Mercedes Benz OE Replacement Parts 0431 Heating of component G3/5 (Left O2 sensor, after TWC [KAT]) : Open circuit (P0056) Possible cause: - G3/5 (Left O2 sensor, after TWC [KAT]) - N10/1kI (Circuit 87 relay, engine) - N10/1f57 (Fuse 57) - Voltage supply via component Z7/36 (Circuit 87 M2e connector sleeve) Affected functions: - Engine diagnosis - Exhaust system Mercedes Benz Truck G 550 (463.236) V8-5.5L (273.963)  Diagnostic Trouble Codes  Page 487 ------------------------------------------------- Test 1: Check power supply of component N3/10 (ME-SFI [ME] control unit). Test 2: Arrangement of fuses Test 3: Power supply Test 4: Check component G3/5 (Left O2 sensor, after TWC [KAT]). 1. Check power supply of component N3/10 (ME-SFI [ME] control unit). Test 1.1: Test voltage supply of circuit 87. ( Check using actual value ) Test 1.2: Test voltage supply of circuit 30. Test 1.3: Test voltage suppl...