Is it necessary to use three-way catalytic cleaning in 4s shop?

This is necessary. The three-way catalytic converter is the purification device of the engine, and whether it can work normally determines the working state of the engine such as fuel consumption, power and emission. If it is blocked or broken, the first thing to do is that your exhaust emissions will exceed the standard, so don't expect it at the annual review. In addition, it will also affect the performance of your engine, which is often manifested in increased fuel consumption, weak acceleration, abnormal exhaust pipe noise and unpleasant exhaust smell.

Attachment: Why it is necessary to clean the three-way catalytic converter:

One of the reasons is that the gasoline used in automobile has high sulfur and phosphorus content, which will form chemical complexes on the surface of oxygen sensor and three-way catalyst.

The second reason: urban roads are crowded, and the start-stop state will make the fuel burn insufficiently, and the products of insufficient combustion will adhere to the surface of the three-way catalyst.

The third reason: When cleaning the fuel injector, throttle and air intake, carbon deposit and particulate matter will pollute the three-way catalyst.

The three-way exhaust is not smooth, the back pressure increases, the waste oil and power of the vehicle decrease, and in serious cases, the three-way exhaust will be blocked, resulting in serious power shortage or even spontaneous combustion of the vehicle. The three-way purification function will be reduced or even invalid, and the vehicle cannot meet the exhaust emission standard, resulting in the service life of three-way purification1-200,000 km shortened by 30,000-50,000 km.