Mercedes Benz

P0161 Heating of component G3/5 (Left O2 sensor, after TWC [KAT]) : Heating capacity is too low. (P0161) Possible cause: ­ G3/5 (Left O2 sensor, after TWC [KAT]) Affected functions: ­ ­ Engine diagnosis Exhaust system ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ Test 1: Check component G3/5 (Left O2 sensor, after TWC [KAT]). 1. Check component G3/5 (Left O2 sensor, after TWC [KAT]). Warning!Communication with ECU required.