4.2 Catalytic ConverterA catalytic converter is used on all of the gasoline-engine cars covered by this manual that have an oxygen sensor system, and on ECO diesel models. Fig. 4-15 shows the construction of the catalytic converter and illustrates the chemical reaction that turns harmful compounds into nitrogen, carbon dioxide, and water.
The catalytic converter is designed to be maintenance free, and under normal operating conditions it should last at least 60,000 miles (96,000 km). However, conditions which result in elevated temperature in the converter can cause damage and leave the catalytic converter partially plugged or inoperative. Some of those conditions are: incorrect ignition timing, incorrect fuel injection CO adjustment, engine misfiring, prolonged idling, prolonged high load such as towing, and the use of leaded gasoline. Reduced power, stalling at idle, rattles in the exhaust system, and measured excessive emissions are all possible indications of a faulty catalytic converter. The converter can be removed and visually inspected if converter failure is suspected. See Checking Catalytic Converter. |