1, can start the vehicle, keep idling, and then to the back of the vehicle to check the vehicle exhaust emissions, if the vehicle exhaust has a pungent taste, and the vehicle exhaust pipe is accompanied by abnormal sound, can prove that the vehicle three catalytic converter is broken.

 2, if there is difficulty in ignition, and recently the vehicle fuel consumption increased significantly, the vehicle is not as strong as before, it may also be caused by the three catalytic converter failure.

 3, the fault lamp is bright; it may also be caused by the three catalytic converter failure of the vehicle.

 4, check the three catalytic converter before and after the oxygen sensor voltage is common, stretch the hand to the exhaust pipe to see if you can feel the airflow, remove the air filter in situ and press the accelerator, the temperature difference before and after the three catalytic converter to determine whether the blockage.

 5, the carbon deposition: with the serious imbalance of the fuel mixture air-fuel ratio in the cylinder, the carbon deposition generated by incomplete combustion will accumulate in the cylinder, aggravating the "stubborn disease" of the engine.

 If the above situation is found in the vehicle, it is necessary to go to the automobile 4S shop or the professional automobile repair factory immediately to check the working condition of the three catalytic converter of the vehicle, and clean or replace the three catalytic converter of the vehicle as the case may be. When using the car, the owner needs to maintain the three-way catalyst of the vehicle regularly. In general, the vehicle travels 30,000 kilometers and needs to be cleaned once.

 Supplementary content: the reasons for the blockage of the three-way catalyst are:

 1, high sulfur content of fuel;

 2, long-term use of sulfur and phosphorus antioxidant oil;

 3, the car in the acceleration and deceleration conditions produce incomplete combustion most, long-term driving in congested roads.

 The three-way catalyst is an important external purification device installed in the automobile exhaust system, which can convert the harmful gas discharged by the automobile exhaust into harmless carbon dioxide, water and nitrogen through oxidation and reduction.When the high temperature automobile exhaust passes through the purification device, the purification agent in the three-way catalyst will enhance the activity of the gas, promote its certain oxidation and reduction chemical reaction, and oxidize it into colorless and nontoxic carbon dioxide gas at high temperature;hydrocarbons are oxidized into water and carbon dioxide at high temperature; nitrogen and oxygen are reduced to nitrogen and oxygen.