Car encyclopedia

Catalytic Converter

A catalytic converter converts the harmful exhaust gases produced by the engine into less harmful emissions before they leave the vehicle’s exhaust system.

Symptoms of Wear or Failure

  • Check Engine Light may illuminate
  • Vehicle may fail emissions inspection
  • Exhaust gas may have unusual smell
  • Vehicle may lack power

Related Repair Advice

  • Catalytic converters are vehicle-specific parts. We recommend using a high quality new part, which is required by emissions control programs in many states.
  • It is very important to have the shop identify why the catalytic converter failed. Failure is almost always due to another problem, which if not resolved, will quickly ruin a new catalytic converter.
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