What Does a Faulty Catalytic Converter Mean?

[BrynleeAnn]

Catalytic converter, also known as catalytic purifier, is a device installed in the vehicle's exhaust system. Its function is to reduce most of the harmful pollutants emitted by the engine. A faulty catalytic converter indicates an issue with the engine's exhaust function. Additional information: 1. Composition: A three-way catalytic converter consists of a metal casing, a mesh base frame, and a catalytic layer (containing precious metals such as platinum and rhodium). It can remove up to 90% of three major pollutants: HC (hydrocarbons), CO (carbon monoxide), and NOx (nitrogen oxides). The term 'three-way' refers to the chemical reactions that occur when these three compounds are removed. 2. Principle: When exhaust gases pass through the converter, the platinum catalyst promotes the oxidation of HC and CO into water vapor and carbon dioxide, while the rhodium catalyst facilitates the reduction of NOx into nitrogen and oxygen. These oxidation and reduction reactions only begin when the temperature reaches 250°C.