故障现象有1辆一汽-大众公司2012年生产的奥迪A6L TFSI(C7)轿车,发动机型号CDZ,行驶里程2.9万km,发动机排放灯亮,发动机怠速抖动。故障诊断连接德国大众6160诊断仪,发动机电子控制单元报故障码:2缸失火;读数据流:2缸失火次数始终处于往高处上升态势,从十几次到100多次。维修技师怀疑2缸点火线圈失效,随即与1缸火花塞和点火线圈进行调换,结果还是报2缸失火,说明 Symptoms include 1 FAW-Volkswagen Audi A6L TFSI (C7) sedan produced in 2012 with an engine model of CDZ and a mileage of 29,000 km. The engine emission lamp is on and the engine is idling. Fault diagnosis Connect Volkswagen 6160 diagnostic unit, engine electronic control unit fault code: 2 cylinder misfire; read data flow: 2 cylinder misfire number is always in the upward trend, from a dozen times to more than 100 times. Maintenance technician doubts 2 cylinder ignition coil failure, then with 1 cylinder spark plug and ignition coil exchange, the result is still reported 2 cylinder fire, that