求翻译：此外，美国环境保护局称，定期保养维护发动机，可有效提高燃油经济性4%左右。而发动机的某些严重问题一经修复，如氧传感器故障，则最多可增加40%的行驶里程。因此，切勿对发动机的故障指示灯视而不见。是什么意思？

In addition, the U.S. Environmental Protection Agency said, regular engine maintenance, can effectively improve the fuel economy of around 4%. And some serious engine problems, once repaired, such as the oxygen sensor failure, up to 40% mileage increase. Therefore, do not turn a blind eye on the eng

In addition, the United States Environmental Protection Agency, said the regular engine maintenance, can be effective in improving fuel economy of around 4 per cent. Some of the serious problems and engine repair, such as an oxygen Sensor malfunction, a maximum increase of 40% of the mileage travell

In addition, US Environmental protection Bureau name, periodic maintenance maintenance engine, but enhances the fuel oil efficiency effectively about 4%.As soon as but engine certain serious questions pass through the repair, if oxygen sensor breakdown, then most may increase 40% travel course.There

In addition, the United States environmental protection agency said that regular maintenance on the engine, which can effectively improve the fuel economy of around 4%. Some serious issues to repair of the engine, such as oxygen sensor failure, you can increase up to 40% miles. Therefore, do not fau

In addition, the U.S. Environmental Protection Agency said, regular engine maintenance, can effectively improve the fuel economy of around 4%. And some serious engine problems, once repaired, such as the oxygen sensor failure, up to 40% mileage increase. Therefore, do not turn a blind eye on the eng