一辆捷达GiX20气门发动机,怠速不稳且冒黑烟,有时换档熄火。 当用VAG1552检测仪检测,电脑内故障存储为空气流量计故障,但在具体检测空气流量计电路情况时却正常,故怀疑是电脑有故障,但更换电脑后故障仍存在。进一步检测全车的数据块,发现08数据组中第七组第二区氧传感器电 A Jetta GiX20 valve engine, idling and black smoke, and sometimes shift stall. When using VAG1552 detector detection, the computer fault is stored as an air flow meter fault, but in the specific detection of air flow meter circuit is normal, it is suspected that the computer is faulty, but the replacement of the computer after the fault still exists. Further testing of the entire vehicle data block, found in the 08 data set of the second group of the second oxygen sensor