How to Determine if the Catalytic Converter is Faulty?

1 Answers
StArianna
07/30/25 12:28am
Check whether the voltage of the front and rear oxygen sensors of the catalytic converter is consistent. If it is consistent, it indicates that the catalytic converter is damaged. Place your hand near the exhaust pipe to feel if there is airflow. If you cannot feel any, it indicates a blockage. Remove the air filter. Rapidly press the accelerator while stationary, and observe if black smoke emerges from the air filter. Measure the temperature difference before and after the catalytic converter to determine if there is a blockage. If the vehicle cannot reach its maximum speed during a test drive and acceleration is poor, it indicates a blockage.
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