What is the cause of the failure of GAC Chuanqi emission system?

Cause of failure of Guangzhou Automobile Chuanqi emission system: 1, poor gasoline quality may lead to abnormal mixing ratio, failure of electronic parts and abnormal exhaust system; 2. Electronic components of the intake and exhaust system are faulty, such as oxygen sensor, carbon canister solenoid valve, air flow meter sensor, electromagnetic control valve on turbocharger or carbon deposit inside the engine. Guangzhou Automobile Chuanqi, a wholly-owned subsidiary of Guangzhou Automobile Group Co., Ltd., is a high-tech enterprise dedicated to the research and development of complete vehicles, engines, automotive supplies and automotive engineering technology. The company was established on July 2, 20081,and its headquarters is located in Panyu District, Guangzhou. Its products include Chuanqi series cars and SUVs, including Chuanqi GA5, Chuanqi GS5, GS5 Subbo, Chuanqi GA6, Chuanqi GA3 and Chuanqi GA3S.