What is the reason why the fault light of Ruifeng m3 1.5t engine is on?

The fault light of Ruifeng m3 1.5t engine is on, which is an engine exhaust system fault. According to the relevant public information, the fault light of Ruifeng m3 1.5t engine is the fault of engine exhaust system, which is usually caused by carbon deposition in automobile engine or poor fuel quality. Car owners are advised to clean up the carbon deposits in throttle, air intake and engine combustion chamber.