2005 Toyota Sienna Catalytic Converter

A catalytic converter, often referred to as a "cat," is an essential component of your engine's exhaust system. This device uses catalysts to transform harmful chemicals in the exhaust gases.

What are the signs of a bad catalytic converter?

• Check engine light
  The dashboard warning light may illuminate, indicating potential issues.
• Decreased engine performance
  Noticeable loss of power, acceleration, or overall engine performance.
• Poor fuel economy
  A significant drop in fuel efficiency can occur as the converter fails.
• Excessive exhaust emissions
  Increased emissions, including a strong sulfur or rotten egg smell.
• Rattling noises
  Unusual rattling sounds from the exhaust system, indicating internal damage.
• Overheating
  The engine may run hotter than normal due to restricted exhaust flow.
• Failed emissions test
  Inability to pass emissions testing due to high pollution levels.

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