What happens if the secondary air pump is broken and not replaced?

[AidenLee]

If the secondary air pump is broken and not replaced, the malfunction indicator light will illuminate, and a trouble code indicating "incorrect secondary air flow" may appear. Below is more information about the secondary air pump: Introduction: The secondary air system is one of the external purification devices designed to reduce exhaust emissions. It is used for exhaust reprocessing during the engine warm-up phase. In this process, fresh air is directly blown into the exhaust manifold to heat the catalytic converter more quickly. The engine controls the secondary air pump through the secondary air pump relay. Function: When the engine is cold, the secondary air pump supplies air to the three-way catalytic converter. This allows the exhaust gases to react with the oxygen in the air for secondary combustion, thereby increasing the temperature of the three-way catalytic converter. This helps the catalytic converter reach its optimal operating temperature faster, reducing the emission of harmful substances in the exhaust and serving an environmental protection purpose.