Catalytic Converter: Precautions
WARNING: This page is about a different car, the 2009 Mercury Sable, 2009 Ford Taurus X, and 2009 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Do not use leaded fuel in a vehicle equipped with a catalytic converter. In a vehicle that is continually misfueled, the lead in the fuel will be deposited in the catalytic converter and completely blanket the catalyst. Lead reacts with platinum to "poison" the catalyst. Continuous use of leaded fuel may destroy the catalyst and render the catalytic converter useless. The addition of lead to the catalytic converter may also solidify the catalyst, causing excessive back pressure in the exhaust system and possibly causing engine damage.
CAUTION:
Extremely high temperatures of 1,100°C (2,012°F) or above due to misfiring or an over-rich fuel/air mixture will cause the ceramic substrate to sinter or burn, destroying the catalytic converter. Do not continue to operate the vehicle if the engine is misfiring, there is a power loss, or other unusual operating conditions, such as engine overheating and backfiring.
The catalytic converter is designed to provide a long life. No maintenance is necessary for the catalytic converter.