Q: What is the purpose of a catalytic converter and how should it be checked and replaced?
A: Before replacing the catalytic converter due to a Federally mandated warranty on emission components, consult a dealer. The catalytic converter reduces exhaust pollutants, with two types available: conventional oxidation and three-way catalysts. If you suspect a malfunction, have it checked by a dealer or emissions facility. Inspect the converter for leaks, corrosion, or damage when servicing the vehicle, especially around the welds and flanges. A plugged converter can be diagnosed using a vacuum gauge. If the converter is damaged or restricted, it might need replacement. Welded converters require professional removal, while bolted ones follow exhaust system guidelines.