Catalytic Converter: Description and Operation

Monolith Catalytic Converter:

CAUTION: Prolonged operation with a misfiring or flooded engine may cause the converter to overheat. This could cause damage either to the catalyst itself or the operating vehicle and possible personal injury.

NOTICE: When jacking or lifting vehicle from frame side rails, be certain lift pads do not contact catalytic converter or damage to converter may result.

The catalytic converter is an emission control device added to the exhaust system to reduce pollutants from the exhaust gas stream.

NOTICE: The catalytic converter requires the use of unleaded fuel only, or damage to the catalyst may result.

Periodic maintenance of the exhaust system is not required.


A dual bed monolith catalytic converter is used in combination with two different types of catalyst. They are oxidation catalyst and three-way (reduction/oxidation) catalyst.

The catalysts have coatings that contain platinum and palladium. The oxidation catalyst lowers the level of hydrocarbons (HC) and carbon monoxide (CO). The three-way catalyst lowers the levels of oxide of nitrogen (NOx) as well as HC and CO.