Symptoms of three-way catalytic converter failure, performance of three-way catalytic converter failure

The working principle is as follows:

When the high-temperature automobile exhaust undergoes three-way catalysis, the purifier in the three-way catalysis will enhance the activity of the three harmful gases CO, HC and NOx, and promote their oxidation-reduction reactions. Among them, CO is oxidized to colorless and non-toxic CO at high temperature₂; HC is oxidized to H₂O and CO at high temperature₂; NOx is reduced to N at high temperature₂And O₂.

Symptoms of broken three-way catalytic converter (fault performance)

1, Poor exhaust, engine overheating

The damage of the three-way catalytic converter is due to blockage, and the accumulation of high-temperature exhaust gas can easily cause the engine temperature to be too high.

2, The engine fault light is on

When the engine electronic control ECU fails to monitor or monitors the oxygen sensor signal is abnormal, the engine fault light will light up.

3, Carbon accumulation

As the air-fuel ratio of the combustible mixture in the cylinder is seriously unbalanced, the carbon deposits produced by incomplete combustion will accumulate in the cylinder in a large amount, thereby increasing the "chronic disease" of the engine.

4, Fuel consumption increased, power decreased

The three-way catalytic damage will affect the normal signal of the oxygen sensor, which will result in the engine's inability to accurately control the fuel injection volume, which will result in an increase in fuel consumption and a decrease in power.

5, Exhaust gas pollution increases

Without the three-way catalysis to catalytically reduce the harmful gases emitted by the exhaust, the exhaust pollution of the vehicle will be aggravated.

Recommended reading:

How often is the three-way catalytic converter cleaned, and the three-way catalytic cleaning and maintenance method of the car

Don’t take the advantages of the three-way catalytic converter, it’s great to dismantle the three-way catalytic car